USS Iowa (BB-61) is the lead ship of her class of battleship and the fourth in the United States Navy to be named after the state of Iowa. Owing to the cancellation of the Montana-class battleships, Iowa is the last lead ship of any class of United States battleships and was the only ship of her class to have served in the Atlantic Ocean during World War II.

Iowa was decommissioned for the last time in October 1990 after 19 total years of active service, and was initially stricken from the Naval Vessel Register (NVR) in 1995. She was reinstated from 1999 to 2006 to comply with federal laws that required retention and maintenance of two Iowa-class battleships. In 2011 Iowa was donated to the Los Angeles–based non-profit Pacific Battleship Center and was permanently moved to Berth 87 at the Port of Los Angeles in 2012, where she was opened to the public as the USS Iowa Museum.

On 24 February 1943, Iowa put to sea for a shakedown in the Chesapeake Bay and along the Atlantic coast. She got underway on 27 August for Argentia, Newfoundland, to counter the threat of the German battleship Tirpitz which was reportedly operating in Norwegian waters, before returning to the United States on 25 October for two weeks of maintenance at the Norfolk Navy Yard.[4]

Iowa completed her presidential escort mission on 16 December by returning the President to the United States.[7] Roosevelt addressed the crew of Iowa prior to leaving by stating, "... from all I have seen and all I have heard, the Iowa is a 'happy ship,' and having served with the Navy for many years, I know—and you know—what that means." He also touched on the progress made at the conference before concluding his address with "... good luck, and remember that I am with you in spirit, each and every one of you."[8]

On 18 March 1944, Iowa, flying the flag of Vice Admiral Willis A. Lee (Commander Battleships, Pacific), joined in the bombardment of Mili Atoll in the Marshall Islands. Although struck by two Japanese 4.7 in (120 mm) projectiles, Iowa suffered negligible damage. She then rejoined TF 58 on 30 March, and supported air strikes against the Palau Islands and Woleai of the Carolines for several days.[2]

In the opening phases of the Mariana and Palau Islands campaign, Iowa protected the American carriers during air strikes on the islands of Saipan, Tinian, Guam, Rota, and Pagan Island on 12 June. Iowa was then detached to bombard enemy installations on Saipan and Tinian on 13–14 June, which resulted in the destruction of a Japanese ammunition dump. On 19 June, in an engagement known as the Battle of the Philippine Sea, Iowa, as part of the battle line of TF 58, helped repel four massive air raids launched by the Japanese Middle Fleet. This resulted in the almost complete destruction of Japanese carrier-based air-forces, with Iowa claiming the destruction of three enemy aircraft. Iowa then joined in the pursuit of the fleeing enemy fleet, shooting down one torpedo plane and assisting in splashing another.[2][4]

Throughout July, Iowa remained off the Marianas supporting air strikes on the Palaus and landings on Guam. After a month's rest, Iowa sailed from Eniwetok as part of the Third Fleet, and helped support the landings on Peleliu on 17 September. She then protected the carriers during air strikes against the Central Philippines to neutralize enemy air power for the long-awaited invasion of the Philippines. On 10 October, Iowa arrived off Okinawa for a series of air strikes on the Ryukyu Islands and Formosa. She then supported air strikes against Luzon on 18 October and continued this duty during General Douglas MacArthur's landing on Leyte on 20 October.[2]

In a last-ditch attempt to halt the United States campaign to recapture the Philippines, the Imperial Japanese Navy struck back with Shō-Gō 1, a three-pronged attack aimed at the destruction of American amphibious forces in Leyte Gulf. The plan called for Vice-Admiral Jisaburō Ozawa to use the surviving Japanese carriers as bait to draw US carriers of TF 38 away from the Philippine beachheads, allowing Imperial Japanese Admirals Takeo Kurita, Kiyohide Shima, and Shōji Nishimura to take surface task forces through the San Bernardino Strait and Surigao Strait, where they would rendezvous and attack the US beachheads.[9][10]Iowa accompanied TF 38 during attacks against the Japanese Central Force under the command of Admiral Kurita as it steamed through the Sibuyan Sea toward San Bernardino Strait. The reported results of these attacks and the apparent retreat of the Japanese Central Force led Admiral William "Bull" Halsey to believe that this force had been ruined as an effective fighting group; as a result, Iowa, with TF 38, steamed after the Japanese Northern Force off Cape Engaño, Luzon. On 25 October 1944, when the ships of the Northern Force were almost within range of Iowa's guns, word arrived that the Japanese Central Force was attacking a group of American escort carriers off Samar. This threat to the American beachheads forced TF 38 to reverse course and steam to support the vulnerable escort carrier fleet. However, the fierce resistance put up by the 7th Fleet in the Battle off Samar had already caused the Japanese to retire and Iowa was denied a surface action. Following the Battle of Leyte Gulf, Iowa remained in the waters off the Philippines screening carriers during strikes against Luzon and Formosa. She sailed for the West Coast late in December 1944.[2]

Iowa in drydock in San Francisco, undergoing repairs and modernization after being damaged during Typhoon Cobra

On 18 December, the ships of TF 38 unexpectedly found themselves in a fight for their lives when Typhoon Cobra overtook the force—seven fleet carriers, six light carriers, eight battleships, 15 cruisers, and about 50 destroyers—during their attempt to refuel at sea. At the time, the ships were operating about 300 mi (480 km) east of Luzon in the Philippine Sea.[11] The carriers had just completed three days of heavy raids against Japanese airfields, suppressing enemy aircraft during the American amphibious operations against Mindoro in the Philippines. The task force rendezvoused with Captain Jasper T. Acuff and his fueling group on 17 December with the intention of refueling all ships in the task force and replacing lost aircraft.[12] Although the sea had been growing rougher all day, the nearby cyclonic disturbance gave relatively little warning of its approach. On 18 December, the small but violent typhoon overtook the task force while many of the ships were attempting to refuel. Many of the vessels were caught near the center of the storm and buffeted by extreme seas and hurricane-force winds. Three destroyers—Hull, Monaghan, and Spence—capsized and sank with nearly all hands, while a cruiser, five aircraft carriers, and three destroyers suffered serious damage.[11] Approximately 790 officers and men were lost or killed, with another 80 injured. Fires occurred in three carriers when planes broke loose in their hangars, and some 146 planes on various ships were swept overboard or damaged beyond economical repair by fires or impacts.[12]Iowa reported zero injured sailors as a result of the typhoon,[13] but suffered a loss of one of her float planes, and damage to one of her shafts.[4][12] The damaged shaft required Iowa to return to the US, and she arrived at San Francisco on 15 January 1945, for repairs. During the course of the overhaul Iowa had her bridge area enclosed, and was outfitted with new search radars and fire-control systems.[4]

Missouri (left) transfers personnel to Iowa in advance of the surrender ceremony planned for 2 September.

Iowa sailed on 19 March 1945 for Okinawa, arriving on 15 April to relieve her sister ship New Jersey. From 24 April, Iowa supported carrier operations which aimed to establish and maintain air superiority for ground forces during their struggle for the island. She then supported air strikes off southern Kyūshū from 25 May to 13 June. Afterward, she sailed toward northern Honshū and Hokkaidō, and participated in strikes on the Japanese home islands on 14–15 July by bombarding Muroran, Hokkaidō, destroying steel mills and other targets. The city of Hitachi on Honshū was shelled beginning the night of 17 July and lasting to 18 July. On 29 and 30 July, Iowa trained her guns on Kahoolawe for a bombardment and continued to support fast carrier strikes until the cessation of hostilities on 15 August as a result of the atomic bombings of Hiroshima and Nagasaki.

On 27 August, Iowa and her sister ship Missouri entered Sagami Bay to oversee the surrender of the Yokosuka Naval Arsenal.[2][4] Two days later, she entered Tokyo Bay with the occupation forces. Here, a number of sailors from Missouri were temporarily stationed on Iowa for the duration of the surrender ceremony which took place aboard Missouri.[14] After serving as Admiral Halsey's flagship for the surrender ceremony on 2 September, Iowa remained in the bay as part of the occupying force. As part of the ongoing Operation Magic Carpet, she received homeward bound GIs and liberated US prisoners of war before departing Tokyo Bay on 20 September, bound for the United States.[2][4]

Iowa arrived in Seattle, Washington, on 15 October 1945, then sailed for Long Beach, California, where she engaged in training operations until returning to Japan in 1946 to serve as flagship for the 5th Fleet. She returned to the United States on 25 March 1946 and resumed her role as a training ship. During her usual routine of drills and maneuvers she also embarked Naval Reserve elements and midshipmen for training. In October, Iowa underwent a period of overhaul and modernization, which resulted in the addition of the SK-2 Radar and the loss of a number of 20 mm and 40 mm gun mounts. In July, following the Bikini atomic experiments, the old battleship Nevada was selected as a target for a live fire exercise to be carried out by Iowa and other sea and air assets of the navy. The exercise began with separate shellings from a destroyer, heavy cruiser, and Iowa, but this did not sink the ship, and so Nevada was finished off with one aerial torpedo hit amidships, sinking her 65 mi (105 km) from Pearl Harbor on 31 July 1948.[15][16] In September 1948, as part of the post World War II drawdown of the armed forces, Iowa was deactivated at San Francisco, and then formally decommissioned into the United States Navy reserve fleets on 24 March 1949.[4]

In 1950, North Koreainvaded South Korea, prompting NATO members, including the United States, to intervene in the name of the United Nations. President Harry S. Truman was caught off guard when the invasion struck, but he quickly ordered US forces stationed in Japan to transfer to South Korea. Truman also sent US based troops, tanks, fighter and bomber aircraft, and a strong naval force to the area to support South Korea. As part of the naval mobilization, Iowa was reactivated on 14 July 1951, and formally recommissioned on 25 August, with Captain William R. Smedberg, III, in command. Iowa sailed for Korean waters in March 1952. On 1 April she relieved her sister ship USS Wisconsin (BB-64) and became the flagship of Vice AdmiralRobert P. Briscoe, Commander of the Seventh Fleet.[4] In her first combat operation of the Korean War, Iowa fired her main guns near Wonsan-Sŏngjin on 8 April 1952, with the goal of striking North Korean supply lines. In the company of other naval vessels Iowa again engaged North Korean forces the following day, this time against enemy troop concentrations, supply areas, and suspected gun positions in and around Suwon Dan and Kojo. In support of South Korea's I Corps, Iowa shelled enemy positions on 13 April, killing 100 enemy soldiers, destroying six gun emplacements, and wrecking a division headquarters. The next day she entered Wonsan Harbor and shelled warehouses, observation posts and railroad marshaling yards before moving out to rejoin the UN flotilla aiding ground forces around Kosong. On 20 April, in her first combat action above the 38th parallel, Iowa shelled railroad lines at Tanchon, where four railroad tunnels were destroyed, before sailing to Chindong and Kosong for a two-day bombardment of North Korean positions.[4]

USS Iowa fires a 16 in (406mm) shell towards a North Korean target in 1952.

On 25 May Iowa, following her sister ship Missouri's example, arrived in the waters off Chongjin, a North Korean industrial center approximately 48 nmi (55 mi; 89 km) from the Russian border. Upon arrival, Iowa proceeded to shell the industrial and rail transportation centers in Chongjin, after which she moved south to aid the US X Corps. En route to US positions, Iowa again bombarded Sŏngjin, destroying several railroad tunnels and bridges in the area. On 28 May, Iowa rejoined the main body of the US fleet supporting the X Corps, heavily shelling several islands in Wonsan Harbor.[4]

Throughout June, Iowa trained her guns on targets at Mayang-do, Tanchon, Chongjin, Chodo-Sokcho and the ports of Hŭngnam and Wonsan in support of the UN and South Korean forces. On 9 June, a helicopter from Iowa rescued a downed pilot from the carrier Princeton.[4] At the time, Princeton was operating with TF 77, and with other carriers in the task force who were involved in a bombing campaign against North Korean supply lines, troop concentrations, and infrastructure; additionally, the carriers were flying close air support missions for ground forces fighting against the North Korean forces.[17] In July, Iowa received a new skipper, Captain Joshua W. Cooper, who assumed command of the battleship for the remainder of her Korean War tour.[4]

On 20 August, Iowa took aboard nine wounded men from the destroyer Thompson after Thompson was hit by a Chinese artillery battery while shelling enemy positions at Sŏngjin. At the time, Iowa was operating 16 mi (26 km) south of Sŏngjin, and after receiving the wounded destroyer crewmen, Iowa covered Thompson as she retreated into safer waters.[4][18]

Iowa fires her guns off the coast of Koje on 17 October 1952.

On 23 September, GeneralMark W. Clark, the Commander-In-Chief of United Nations Forces in Korea, came aboard Iowa. Clark observed Iowa in action as her guns shelled the Wonsan area for a third time, accounting for the destruction of a major enemy ammunition dump. On 25 September, Iowa fired her guns at an enemy railroad and 30-car train.[4] The following month, Iowa was part of the force involved in Operation Decoy, a feint to draw enemy troops into Kojo and bring them within striking distance of the battleships' big guns. During the operation, Iowa provided anti-aircraft support to Mount McKinley, an amphibious force command ship.[4]

In October 1952 Iowa was serving as flagship for the Commander, Seventh Fleet, and she engaged in 43 gun strikes on targets in the areas of Wonsan, Songjin, Kojo, Chaho, Toejo, Simpo, Hungnam, and Northern Inchon North Korea, and in 27 bombline operations. During these operations, 16,689 rounds were fired from her main and secondary batteries on enemy installations. This action established eligibility for the United Nations Service Medal and the Korean Service Medal with one bronze star.[19]

Iowa embarked midshipmen for at-sea training to Northern Europe in July 1953, and shortly afterwards took part in Operation Mariner, a major NATO exercise, serving as flagship of Vice Admiral Edmund T. Wooldridge, commander of the 2nd Fleet. Upon completion of this exercise, Iowa operated in the Virginia Capes area. Later, in September 1954, she became the flagship of Rear Admiral R. E. Libby, Commander, Battleship Cruiser Force, United States Atlantic Fleet.[2]

From January–April 1955, Iowa made an extended cruise to the Mediterranean Sea as the flagship of the Commander, 6th Fleet. She departed on a midshipman training cruise on 1 June, and upon her return entered Norfolk for a four-month overhaul. Afterward, Iowa continued intermittent training cruises and operational exercises, until 4 January 1957 when she departed Norfolk for duty with the 6th Fleet in the Mediterranean. Upon completion, Iowa embarked midshipmen for a South American training cruise and joined in the International Naval Review off Hampton Roads, Virginia on 13 June.[2]

On 3 September, Iowa sailed for Scotland for NATO's Operation Strikeback. She returned to Norfolk on 28 September, and departed Hampton Roads for the Philadelphia Naval Shipyard on 22 October. She was decommissioned on 24 February 1958 and entered the Atlantic Reserve Fleet at Philadelphia.[2]

From April–August 1984, Iowa underwent refresher training and naval gunfire support qualifications in the Atlantic Ocean. She spent the rest of 1984 on a shakedown cruise in the area around Central America. During this cruise she aided in several humanitarian operations, including in Costa Rica and Honduras,[4][24] before returning to the United States in April 1985 for a period of routine maintenance.[4]

Iowa fires a full broadside of nine 16-inch (406 mm)/50-caliber and six 5-inch (127 mm)/38 cal guns during a target exercise near Vieques Island, Puerto Rico, on 1 July 1984. Shock waves are visible in the water.

In August 1985, Iowa joined 160 other ships for Exercise Ocean Safari, a NATO naval exercise aimed at testing NATO's ability to control sea lanes and maintain free passage of shipping. Owing to bad weather, Iowa and the other ships were forced to ride out rough seas, but Iowa made use of the time to practice hiding herself from enemy forces. While serving with the exercise force, Iowa crossed the Arctic Circle.[25] In October, she took part in Baltic operations, and fired her phalanx guns, 5 in (127 mm) guns, and 16 in (406 mm) guns in the Baltic Sea on 17 October while operating with US and other allied ships.[26] After these operations she returned to the United States.[4]

Beginning on 17 March 1986, Iowa underwent her overdue InSurv inspection. The inspection, which Iowa ultimately failed, was conducted under the supervision of Rear Admiral John D. Bulkeley. Bulkeley found that the ship was unable to achieve her top speed of 33 kn (38 mph; 61 km/h) during a full-power engine run, and recommended to the Chief of Naval Operations and Lehman that Iowa be taken out of service immediately. Rejecting this advice, Lehman instead instructed the leaders of the Atlantic Fleet to ensure that Iowa's deficiencies were corrected.[27]

On 17 August, Iowa set sail for the North Atlantic, and in September she participated in Exercise Northern Wedding by ferrying Marines ashore and assisting helicopter gunships. During the exercise Iowa fired her main guns at Cape Wrath range in Scotland in support of a simulated amphibious assault on 5–6 September, firing a total of 19 16-inch (406 mm) shells and 32 5-inch (127 mm) shells during a 10-hour period and operating in rough seas. During the live fire exercise, a small number of Iowa marines were put ashore to monitor the fall of shot and advise the battleship of gunnery corrections.[30] Afterward, Iowa visited ports in England and Germany before returning to the United States in October.

In December, the ship became the testbed for the Navy's RQ-2 PioneerUnmanned Aerial Vehicle (UAV). The drone was designed to serve as an aerial spotter for the battleship's guns, thereby allowing the guns to be used against an enemy without the need for an airplane or helicopter spotter. Pioneer passed its tests and made its first deployment that same month aboard Iowa.[22]

From January–September 1987 Iowa operated in the waters in and around Central America and participated in several exercises until sailing for the Mediterranean Sea on 10 September to join the 6th Fleet based there. She remained in the Mediterranean until 22 October, when she was detached from the 6th Fleet and departed for operations in the North Sea. On 25 November, as part of Operation Earnest Will, Iowa transited the Suez Canal and set sail for the Persian Gulf, which at the time was one of the battlefields of the first Gulf War (also referred to as the Iran–Iraq War).[4] The presence of US naval vessels in the gulf was in response to a formal petition from Kuwait,[31] whose ships were being raided by Iranian forces who were attempting to cut off weapons shipments from the United States and Europe to Saddam Hussein's regime in Iraq, via Kuwaiti territory. This phase of the war would later be called the "Tanker War" phase of the Iran-Iraq War.[32]Iowa and other vessels operating in the gulf were assigned to escort Kuwaiti tankers from Kuwaiti ports to the open sea, but because US law forbade military escorts for civilian ships flying a foreign flag, the tankers escorted by the United States were reflagged as US merchant vessels and assigned American names.[32] For the remainder of the year Iowa escorted Kuwaiti gas and oil tankers reflagged as US merchant ships from the Persian Gulf through the Strait of Hormuz.[4]

On 20 February 1988, Iowa departed from the Persian Gulf, transited the Suez Canal, and set sail for the United States, arriving at Norfolk on 10 March for routine maintenance. In April, she participated in the annual Fleet Week celebrations before returning to Norfolk for an overhaul. On 26 May, Fred Moosally replaced Larry Seaquist as Captain of Iowa.[33] After the overhaul, Moosally took Iowa on a shakedown cruise around Chesapeake Bay on 25 August. Encountering difficulty in conning the ship through shallow water, Moosally narrowly missed colliding with the frigateMoinester, destroyer Farragut, and the cruiser South Carolina before running aground in soft mud outside the bay's main ship channel near the Thimble Shoals. After one hour, Iowa was able to extricate herself without damage and return to port.[34]Iowa continued with sea trials throughout August and September, then began refresher training in the waters around Florida and Puerto Rico in October, during which the ship passed an Operation Propulsion Program Evaluation.[4][35]

On 20 January 1989, during an improperly authorized gunnery experiment off Vieques Island, Iowa fired a 16-inch (406 mm) shell 23.4 nmi (26.9 mi; 43.3 km), setting a record for the longest-ranged 16 in (406 mm) shell ever fired. In February, the battleship sailed for New Orleans for a port visit before departing for Norfolk. On 10 April, the battleship was visited by the commander of the 2nd Fleet, and on 13 April she sailed to participate in a fleet exercise.[4][36]

Heavy smoke pours from Turret Two following an internal explosion on 19 April 1989.

During a gunnery exercise, at 0955[37] on 19 April 1989, an explosion ripped through the Number Two 16-inch (406 mm) gun turret, killing 47 crewmen. A gunner's mate in the powder magazine room quickly flooded the No. 2 powder magazine, likely preventing catastrophic damage to the ship.[38] At first, Naval Investigative Service (N.I.S., later renamed Naval Criminal Investigative Service or NCIS) investigators theorized that one of the dead crewmen, Clayton Hartwig, had detonated an explosive device in a suicide attempt after the end of an alleged affair with another sailor.[38][39] To support this claim, naval officials pointed to several different factors, including Hartwig's life insurance policy, which named Kendall Truitt as the sole beneficiary in the event of his death,[40] the presence of unexplained materials inside Turret II,[41] and his mental state, which was alleged to be unstable.[42][43]

Although the Navy was satisfied with the investigation and its results,[39] others were unconvinced,[42] and in October 1991, amid increasing criticism, Congress forced the Navy to reopen the investigation.[38] This second investigation, handled by independent investigators, was hampered by the fact that most of the original debris from Iowa had been cleaned up or otherwise disposed of by the Navy before and after the first investigation,[39][40][44] but it did uncover evidence pointing to an accidental powder explosion rather than an intentional act of sabotage.[38][43][45]

While Iowa was undergoing modernization in the early 1980s, her sister ship New Jersey had been dispatched to Lebanon to provide offshore fire support.[46] At the time, New Jersey was the only commissioned battleship anywhere in the world, and it was found that, in an effort to get another battleship commissioned to relieve New Jersey, the modernization of Iowa was stepped up, leaving her in poor condition when she recommissioned in 1984.[40] It was also determined that Captain Fred Moosally was more concerned with the maintenance of the missiles than the training and manning of guns.[47]

Powder from the same lot as the one under investigation was tested at the Naval Surface Warfare Center Dahlgren Division. Spontaneous combustion was achieved with the powder, which had been originally milled in the 1930s and improperly stored in a barge at the Navy's Yorktown, Virginia Naval Weapons Station during a 1988 dry-docking of Iowa.[38][39][40][43] As it degrades, gunpowder gives off ether gas, which is highly flammable and could be ignited by a spark. This revelation resulted in a shift in the Navy's position on the incident, and Admiral Frank Kelso, the Chief of Naval Operations at the time, publicly apologized to the Hartwig family, concluding that there was no real evidence to support the claim that he had intentionally killed the other sailors.[38][40][43][48]Iowa captain Fred Moosally was severely criticized for his handling of the matter, and as a result of the incident the Navy changed the powder-handling procedures for its battleships.[45] The incident remains one of the surface Navy's worst losses of life during peacetime operations.[49]

A flag hoist lies on the deck near the bow of Iowa following the ship's decommissioning ceremony at Norfolk, Virginia

With the collapse of the Soviet Union in the early 1990s and the lack of a perceived threat against the United States came drastic cuts to the defense budget and the battleships were deemed uneconomical. As a result, Iowa was decommissioned for the last time on 26 October 1990, after a total of 19 years of commissioned service. She was the first of the reactivated battleships to be decommissioned, and this was done earlier than originally planned as a result of the damaged turret. Iowa was originally berthed at the Philadelphia Naval Shipyard and later at Naval Station Newport in Newport, Rhode Island from 24 September 1998 to 8 March 2001, when she began her journey under tow to California. The ship arrived in Suisun Bay near San Francisco on 21 April 2001 and joined the Reserve Fleet, where she remained in reserve until struck again from the Naval Vessel Register in March 2006. (She and her sister ships had been struck previously in 1995.[20]) She remained at the Suisun Bay anchorage until November 2011.

Section 1011 of the National Defense Authorization Act of 1996 required the US Navy to reinstate to the Naval Vessel Register two of the Iowa-class battleships that had been struck by the Navy in 1995; these ships were to be maintained in the United States Navy reserve fleets (or "mothball fleet"). The Navy was to ensure that both of the reinstated battleships were in good condition and could be reactivated for use in the Marine Corps' amphibious operations.[50] Due to Iowa's damaged turret, the Navy selected New Jersey for placement into the mothball fleet, even though the training mechanisms on New Jersey's 16-inch (406 mm) guns had been welded down. The cost to fix New Jersey was considered less than the cost to fix Iowa;[20] as a result, New Jersey and Wisconsin were reinstated to the Naval Vessel Register and placed back in the reserve fleet.[50]

New Jersey remained there until the Strom Thurmond National Defense Authorization Act of 1999 required the United States Secretary of the Navy to list and maintain Iowa and Wisconsin on the Naval Vessel Register. The Act also required the Secretary of the Navy to strike New Jersey from the Naval Vessel Register and transfer the battleship to a not-for-profit entity in accordance with section 7306 of Title 10, United States Code. It also required the transferee to locate the battleship in the State of New Jersey.[51] The Navy made the switch in January 1999, allowing New Jersey to open as a museum ship in her namesake state.[52]

On 17 March 2006, the Secretary of the Navy struck Iowa and Wisconsin from the NVR, which cleared the way for both ships to be donated for use as museum ships; but the United States Congress remained "deeply concerned" over the loss of the naval surface gunfire support that the battleships provided, and noted that "navy efforts to improve upon, much less replace, this capability have been highly problematic."[53] As a partial consequence, Congress passed Pub.L. 109–163, the National Defense Authorization Act 2006, requiring that the battleships be kept and maintained in a state of readiness should they ever be needed again.[54] Congress ordered that measures be implemented to ensure that, if need be, Iowa could be returned to active duty.[54] These measures closely mirrored the original three conditions that the National Defense Authorization Act of 1996 which laid out for the maintenance of Iowa while she was in the "mothball fleet".[20][55][56]

In March 2007, the Historic Ships Memorial at Pacific Square (HSMPS) of Vallejo, site of the former Mare Island Naval Shipyard, and a Stockton group submitted proposals for the ship to be a museum. [57] The HSMPS, which had attempted to place the ship in San Francisco, supported the Mare Island–Vallejo site. In October 2007 the Navy informed HSMPS that they were the only viable candidate to acquire Iowa, and their application would be further reviewed after evidence was presented that financing was in place, and when the Stockton and San Francisco groups withdrew or failed to submit a final application respectively.[58][59] On 25 April 2009, Iowa Senate Resolution No. 19 was approved, endorsing HSMPS as USS Iowa's custodian and supporting the battleship's placement at Mare Island.[60]

In February 2010, the Pacific Battleship Center (PBC)[61] supported the efforts to have the ship berthed in San Pedro, Los Angeles, California.[62] In late February the Port of Los Angeles (which includes the San Pedro area) rejected a proposal by the PBC to berth USS Iowa at its facilities because the battleship was not yet available.[63] On 12 April 2010, the Governor of Iowa signed into law Bill SJR2007, which officially formed a 10-member committee to raise about $5 million for the group awarded USS Iowa.[64] The statement supporting the Vallejo group in the original Iowa State Senate's version SR19 was struck in favor of supporting any group actually awarded the battleship.[60]

On 13 May 2010, the Navy announced it would reopen the bidding process, citing HSMPS's lack of progress as the reason.[65] On 24 May 2010 the Federal Register officially reopened the bidding process for the USS Iowa to a California-based city or non-profit organization.[66][67]

On 18 November 2010, the Port of Los Angeles Harbor Commissioners voted unanimously on a resolution to support Berth 87 as the future home of USS Iowa, clearing the way for The Pacific Battleship Center to send its completed application to the Navy.[68] On 6 September 2011, USS Iowa was awarded to Pacific Battleship Center for placement at the Port of Los Angeles. After rehabilitation at the Port of Richmond, California (beginning in October 2011), she was towed to and eventually berthed in the Port of Los Angeles.[69][70]

Starting in December 2011, USS Iowa was open for weekend tours. The Battleship Expo at the Port of Richmond included shipboard access and other exhibits such as 16-inch shells, a short film about the battleship, and other exhibits.[71] On 30 April 2012, USS Iowa was officially donated to the Pacific Battleship Center in Los Angeles by the United States Navy.[72]

Iowa began her journey to the Port of Los Angeles on 26 May 2012 under tow by tugboats. After being anchored off the Southern California coast to have her hull scrubbed to remove any invasive species or contaminants, she was permanently anchored on 9 June 2012 in San Pedro at Berth 87, along the Main Channel, directly south of the World Cruise Center. The museum opened to the public on 7 July, under the direction and control of Pacific Battleship Center.[73][74]

^Iowa was not the first US battleship to have a bathtub, the 1912 joiner plans for the USS Texas (BB-35) and USS New York (BB-34) indicate that bathtubs were in the Admiral's Bath, Captain's Bath, Chief of Staff's bath, Junior Officer's Bath, Warrant Officer's Bath, Wardroom Officer's Baths, and the Sick Bay Bath when those ships were constructed. photo[1][2][3][4]

^Thompson, pp. 26–27. The problems discovered during Bulkeley's inspection included hydraulic fluid leaks in all three main gun turrets, totaling 55 gallons per turret per week; Cosmoline (anticorrosion lubricant) which had not been removed from all the guns; deteriorated bilge piping; frequent shorts in the electrical wiring; pump failures; unrepaired soft patches on high-pressure steam lines; and frozen valves in the ship's firefighting system. Main Turret Three leaked so much oil, hydraulic fluid, and water that the crew referred to it as the "rain forest".

^Thompson, pp. 58–60. According to Thompson, the near-misses with the other navy ships were recorded in Iowa's log as attempts to "render honors" to them. Although other US Navy vessels observed Iowa grounded in the mud, the incident apparently was not acted upon by Moosally's superiors. Mike Fahey, the ship's executive officer, warned the other officers on Iowa to never mention the grounding to anyone, including superior Navy officers.

^Thompson, pp. 70–77. The 20 January long-range, experimental shot was not authorized by the Department of the Navy. The shot was planned and directed by Iowa's Master Chief Fire Controlman Stephen Skelley and Gunnery Officer Lieutenant Commander Kenneth Michael Costigan using increased powder charges and specially-designed shells. The Turret One gun crew leaders considered defying the order because of the unauthorized nature and perceived danger of the experiment, but in the end fired the experimental loads. John McEachren, a mid-level civilian employee at the Navy's Sea Systems Command, improperly authorized the experiment without informing his superiors.

^Garzke, William H.; Dulin, Robert O. (1995). Battleships. Annapolis, Maryland: Naval Institute Press. Archived from the original on 11 March 2007. Retrieved 24 August 2008.

^At the same time, he also pointed out that there was not enough evidence to exonerate Hartwig of the alleged charges, either. In time this would lead the Hartwig family to file a $12 million lawsuit against the Navy. "Cover-up aboard the USS Iowa". Investigative Reporters and Editors, Inc. The IRE Journal. B-net. July 1999. Retrieved 20 September 2012.(subscription required)

^Although the worst loss of life in peace time, the turret explosion aboard Iowa in 1989 is tied with the 1924 explosion in the No. 2 turret aboard the battleship Mississippi, which also claimed 47 lives. "Cover-up aboard the USS Iowa"(PDF). United States General Accounting Office. United States Congress. July 1999. p. 9. Retrieved 24 August 2008.

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Iowa
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Iowa is a U. S. state in the Midwestern United States, bordered by the Mississippi River on the east and the Missouri River and the Big Sioux River on the west. Surrounding states include Wisconsin and Illinois to the east, Missouri to the south, Nebraska and South Dakota to the west, in colonial times, Iowa was a part of French Louisiana and Spanish Louisiana, its state flag is patterned after the flag of France. After the Louisiana Purchase, people laid the foundation for an economy in the heart of the Corn Belt. Iowa is the 26th most extensive in area and the 30th most populous of the 50 United States. Its capital and largest city by population is Des Moines, Iowa has been listed as one of the safest states in which to live. Its nickname is the Hawkeye State, Iowa derives its name from the Ioway people, one of the many Native American tribes that occupied the state at the time of European exploration. Iowa is bordered by the Mississippi River on the east, the Missouri River and the Big Sioux River on the west, Iowa is the only state whose east and west borders are formed entirely by rivers. Iowa has 99 counties, but 100 county seats because Lee County has two, the state capital, Des Moines, is in Polk County. Iowas bedrock geology generally increases in age from west to east, in northwest Iowa, Cretaceous bedrock can be 74 million years old, in eastern Iowa Cambrian bedrock dates to c.500 million years ago. Iowa is generally not flat, most of the consists of rolling hills. Iowa can be divided into eight landforms based on glaciation, soils, topography, Loess hills lie along the western border of the state, some of which are several hundred feet thick. Northeast Iowa along the Mississippi River is part of the Driftless Zone, consisting of steep hills, several natural lakes exist, most notably Spirit Lake, West Okoboji Lake, and East Okoboji Lake in northwest Iowa. To the east lies Clear Lake, man-made lakes include Lake Odessa, Saylorville Lake, Lake Red Rock, Coralville Lake, Lake MacBride, and Rathbun Lake. The states northwest area has remnants of the once common wetlands. Iowas natural vegetation is tallgrass prairie and savanna in areas, with dense forest and wetlands in flood plains and protected river valleys. Most of Iowa is used for agriculture, crops cover 60% of the state, grasslands cover 30%, as of 2005 Iowa ranked 49th of U. S. states in public land holdings. Endangered or threatened plants include western prairie fringed orchid, eastern prairie fringed orchid, Meads milkweed, prairie bush clover, the explosion in the number of high-density livestock facilities in Iowa has led to increased rural water contamination and a decline in air quality. Iowa has a continental climate throughout the state

2.
Brooklyn Navy Yard
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It was bounded by Navy Street and Flushing and Kent Avenues, and at the height of its production of warships for the United States Navy, it covered over 200 acres. The tremendous efforts of its 70,000 workers during World War II earned the yard the nickname The Can-Do Shipyard, following the American Revolution, the waterfront site was used to build merchant vessels. Federal authorities purchased the old docks and 40 acres of land for $40,000 in 1801, many officers were housed in Admirals Row. Military chain of command was strictly observed, the nations first ironclad ship, Monitor, was fitted with its revolutionary iron cladding at the Continental Iron Works in nearby Greenpoint. By the American Civil War, the yard had expanded to employ about 6000 men, in 1890, the ill-fated Maine was launched from the yards ways. In 1937, the battleship North Carolina was laid down, in 1938, the yard employed about 10,000 men, of whom one-third were Works Progress Administration workers. The battleship Iowa was completed in 1942 followed by the Missouri, on 12 January 1953, test operations began on Antietam, which emerged in December 1952 from the yard as Americas first angled-deck aircraft carrier. At its peak, during World War II, the yard employed 70,000 people,24 hours a day, the Brooklyn Naval Hospital, constructed 1830–38 and rebuilt 1841–43, was decommissioned in the mid-1970s. It was one of the oldest naval hospitals in the United States, the 60, 000-square-foot complex was designed by Martin E. Thompson. The hospital had its beginning in 1825 when the Secretary of the Navy purchased 25 acres adjacent to the Brooklyn Naval Yard. The hospital was active from the Civil War through World War II with the Navy Surgeon General reporting in 1864 an average of 229 patients, the hospital also counted on its staff some of first female nurses and medical students in the United States Navy. On November 19,1964, based on the study, the closure of the yard was announced, along with the Armys Fort Jay on Governors Island and its Brooklyn Army Terminal. At the time, the yard employed 10,600 civilian employees and 100 military personnel with a payroll of about US$90 million. The closure was anticipated to save about 18.1 million dollars annually, the plan was never put in place. The Wagner Administration looked to the industry to build a car plant inside the yard. No U. S. car manufacturer was interested, and foreign car manufacturers claimed that with the conversion of the dollar, the Navy decommissioned the yard in 1966, after the completion of the Austin-class amphibious transport dock USS Duluth. The Johnson administration refused to sell the yard to the City of New York for 18 months, when the new Nixon administration came into power, they signed the papers to sell the yard to the city. Leases were signed inside the yard even before the sale to the city was signed, cLICKs lease with the newly formed Seatrain Shipbuilding was not very business friendly

3.
Ilo Wallace
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Ilo Browne Wallace was the wife of Henry A. Wallace, the 33rd U. S Vice President and later Secretary of Commerce. She was the Second Lady of the United States from 1941 until 1945 and she was the sponsor of the USS Iowa. Born in Indianola, Iowa, she was the daughter of James Lytle Browne and his wife and she attended Monmouth College with the class of 1911. She married Henry Agard Wallace in Des Moines, Iowa, on May 20,1914 and they had three children, Henry Browne Wallace, Jean Browne Wallace, and Robert Browne Wallace. The company is now known as Pioneer Hi-Bred International, the second largest seed company. She died at the Wallace estate, Farvue Farm, in South Salem, New York

4.
Service star
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The service star may also be referred to as a campaign star or battle star depending on which award is authorized the star and the manner in which the device is used for the award. Service stars, Campaign stars, and Battle stars are worn with one point of the star pointing up on the ribbon of a medal. A silver star is worn instead of five bronze stars, a service star is sometimes mistaken for a Bronze Star or Silver Star. The service star is similar to the gold and silver 5⁄16 Inch Stars which may be authorized to be worn on specific individual decorations of certain services to denote additional decorations. Service stars are authorized for the following United States expeditionary medals, Armed Forces Expeditionary Medal, Navy Expeditionary Medal, Service stars are also authorized for the Global War on Terrorism Expeditionary Medal effective February 9,2015 retroactive to September,11,2001. Each star represents a deployment in support of an approved GWOT operation, only one GWOT-EM is awarded for each operation. The five GWOT-EM approved operations by inclusive dates are, Enduring Freedom,11,2001 - TBD Iraqi Freedom, Mar.19,2003 - Aug.31, 2010Nomad Shadow, Nov.05,2007 - TBD New Dawn, Sep. 01,2010 - Dec.31,2011 Inherent Resolve, the bronze service star is also authorized for certain unit awards such as the Presidential Unit Citation to denote a second and subsequent award. The service ribbon itself indicates the first award, with a service star being added to indicate the second. If ever applicable, a service star is worn instead of five bronze stars. As a result, at least one star will be worn on the ribbon. However, though authorized for wear, no battle stars have been approved for wear, only a combatant commander can initiate a request for a battle star. The Chairman of the Joint Chiefs of Staff is the approving authority, only one award of the Global War on Terrorism Expeditionary Medal and one award of the Global War on Terrorism Service Medal may be authorized for any individual. The specific manner of wear and symbolism of the stars varied from medal to medal, for example, an American Campaign Medal with a bronze service star indicated the service member had participated in an antisubmarine campaign. On other medals, bronze service stars were used on the service ribbon for those recipients of medals in possession of authorized campaign claps for those medals. Similarly, during the Vietnam War and afterwards, the Battle Effectiveness Award took the place of receiving battle stars for superior battle efficiency in place of combat operations. Awards and decorations of the United States military United States military award devices 5/16 inch star Oak leaf cluster United States award regulations for World War II

5.
Museum ship
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A museum ship, also called a memorial ship, is a ship that has been preserved and converted into a museum open to the public for educational or memorial purposes. Some are also used for training and recruitment purposes, mostly for the number of museum ships that are still operational. Many, if not most, museum ships are also associated with a maritime museum, only a few survive, sometimes because of historical significance, but more often due to luck and circumstance. The restoration and maintenance of museum ships presents problems for historians who are asked for advice, for instance, the rigging of sailing ships has almost never survived, and so the rigging plan must be reconstructed from various sources. Studying the ships also allows historians to analyze how life on and operation of the ships took place, numerous scientific papers have been written on ship restoration and maintenance, and international conferences are held discussing the latest developments. Another consideration is the distinction between a museum ship, and a ship replica. As repairs accumulate over time, less and less of the ship is of the materials. Visitors without historical background are often unable to distinguish between a historical museum ship and a ship replica, which may serve solely as a tourist attraction. Typically the visitor enters via gangplank, wanders around on the deck, then goes below, usually using the original stairways, giving a sense of how the crew got around. The interior features restored but inactivated equipment, enhanced with mementos including old photographs, explanatory displays, pages from the logs, menus. Some add recorded sound effects, audio tours or video displays to enhance the experience, in some cases, the ships radio room has been brought back into use, with volunteers operating amateur radio equipment. Often, the callsign assigned is a variation on the identification of the ship. For example, the submarine USS Cobia, which had the call NBQV, is now on the air as NB9QV. The World War II submarine USS Pampanito, berthed at the San Francisco Maritime National Historical Park, had the wartime call NJVT and is now on the air as NJ6VT, in other cases, such as the USS Missouri, a distinctive call is used. This radio work not only helps restore part of the vessel, a number of the larger museum ships have begun to offer hosting for weddings, meetings, other events, and sleepovers, and on a few ships still seaworthy, cruises. In the United States, this includes the USS Constitutions annual turnaround, a place on the deck is by invitation or lottery only, and highly prized. Many consider the appeal of an interesting old vessel on the city waterfront strong enough that any port city should showcase one or more museum ships. This may even include building a ship at great expense

6.
Port of Los Angeles
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The Port of Los Angeles, also called Americas Port, is a port complex that occupies 7,500 acres of land and water along 43 miles of waterfront and adjoins the separate Port of Long Beach. The port is located in San Pedro Bay in the San Pedro and Wilmington neighborhoods of Los Angeles, a department of the City of Los Angeles, the Port of Los Angeles employs nearly 896,000 people throughout the LA County Region and 3.6 million worldwide. Around $1.2 billion worth of cargo comes in and out each day at the LA Port, the Ports Channel Depth is 53 feet. The port has 23 cargo terminals,270 deepwater berths,77 container cranes,9 container terminals, the LA Port imports furniture, footwear, electronics, automobile parts, and apparel. The Port exports wastepaper, cotton, resins, animal feed, the ports major trading partners are China, Hong Kong, Japan, South Korea, Taiwan, and Vietnam. S. In 1542, Juan Rodriquez Cabrillo discovered the Bay of Smokes, the south-facing San Pedro Bay was originally a shallow mudflat, too soft to support a wharf. Visiting ships had two choices, stay far out at anchor and have their goods and passengers ferried to shore, or beach themselves. That sticky process is described in Two Years Before the Mast by Richard Henry Dana, phineas Banning greatly improved shipping when he dredged the channel to Wilmington in 1871 to a depth of 10 feet. The port handled 50,000 tons of shipping that year, after Bannings death in 1885, his sons pursued their interests in promoting the port, which handled 500,000 tons of shipping in that year. The Southern Pacific Railroad and Collis P. Huntington wanted to create Port Los Angeles at Santa Monica, however, the Los Angeles Times publisher Harrison Gray Otis and U. S. Senator Stephen White pushed for support of the Port of Los Angeles at San Pedro Bay. The Free Harbor Fight was settled when San Pedro was endorsed in 1897 by a commission headed by Rear Admiral John C, with U. S. government support, breakwater construction began in 1899, and the area was annexed to Los Angeles in 1909. The Los Angeles Board of Harbor Commissioners was founded in 1907, in 1912 the Southern Pacific Railroad completed its first major wharf at the port. During the 1920s, the port surpassed San Francisco as the West Coasts busiest seaport, in the early 1930s, a massive expansion of the port was undertaken with the construction of a breakwater three miles out and over two miles in length. In addition to the construction of this outer breakwater, a breakwater was built off Terminal Island with docks for seagoing ships. It was this improved harbor that hosted the events for the 1932 Summer Olympics. During World War II the port was used for shipbuilding, employing more than 90,000 people. In 1959, Matson Navigation Companys Hawaiian Merchant delivered 20 containers to the port, the opening of the Vincent Thomas Bridge in 1963 greatly improved access to Terminal Island and allowed increased traffic and further expansion of the port

7.
Iowa-class battleship
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Four were completed, USS Iowa, USS New Jersey, USS Missouri, and USS Wisconsin. Two more were laid down, USS Illinois and USS Kentucky, based on wartime experience, they were to serve as fast escorts for Essex-class aircraft carriers. Between the mid-1940s and the early 1990s, the Iowa-class battleships fought in four major US wars, in World War II, they defended aircraft carriers and shelled Japanese positions. All four were reactivated and modernized at the direction of Congress in 1981, the first reactivated battleship, New Jersey, was commissioned for the third time on 28 December 1982. Then Iowa was recommissioned 28 April 1984, Missouri was recommissioned 10 May 1986, during Operation Desert Storm in 1991, Missouri and Wisconsin fired missiles and 16-inch guns at Iraqi targets. The Navy had spent about $1.7 billion, from 1981 through 1988, to modernize, costly to maintain, the battleships were decommissioned during the post-Cold War draw down in the early 1990s. This resulted in a naval gunfire debate over whether battleships should have a role in the modern navy. Ultimately, all four ships were stricken from the Naval Vessel Register, with the transfer of Iowa in 2012, all four are part of various non-profit maritime museums across the US. Work on what would become the Iowa-class battleship began on the first study in early 1938. Hart, head of the General Board and these studies had no further impact on the design of the Iowa class, but development of this design continued and eventually evolved into the design for the Montana class. Another design, pursued by the Design Division section of the Bureau of Construction, beginning on 17 January 1938, under Captain A. J. Three improved plans—A, B, and C—were designed at the end of January, an increase in draft, vast additions to the armor, and the substitution of twelve 6-inch guns in the secondary battery was common between the three designs. A was the largest, at 59,060 long tons and it required 277,000 shp to make 32.5 knots. B was the smallest at 52,707 long tons, like A it had a top speed of 32.5 knots and it also carried only nine 16-inch guns, in three triple turrets. C was similar but it added 75,000 shp, to make the original requirement of 35 knots, the weight required for this and a longer belt—512 feet, compared with 496 feet for B—meant that the ship was 55,771 long tons. Powell, and the long-retired Admiral and former Chief of the Bureau of Ordnance Joseph Strauss, the board requested an entirely new design study, focusing on increasing the size of the 35,000 long tons South Dakota class. The first plans made for this indicated that 30 knots was possible on a displacement of about 37,600 long tons. 33 knots could be bought with 220,000 shp and a displacement of around 39,230 long tons and these designs were able to convince the General Board that a reasonably well-designed and balanced 33 knot battleship was possible within the terms of the escalator clause

8.
Battleship
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A battleship is a large armored warship with a main battery consisting of large caliber guns. During the late 19th and early 20th centuries the battleship was the most powerful type of warship, the word battleship was coined around 1794 and is a contraction of the phrase line-of-battle ship, the dominant wooden warship during the Age of Sail. The term came into use in the late 1880s to describe a type of ironclad warship. In 1906, the commissioning of HMS Dreadnought heralded a revolution in battleship design, subsequent battleship designs, influenced by HMS Dreadnought, were referred to as dreadnoughts. Battleships were a symbol of naval dominance and national might, the launch of Dreadnought in 1906 commenced a new naval arms race. Jutland was the largest naval battle and the only full-scale clash of battleships in the war, the Naval Treaties of the 1920s and 1930s limited the number of battleships, though technical innovation in battleship design continued. The value of the battleship has been questioned, even during their heyday, there were few of the decisive fleet battles that battleship proponents expected, and used to justify the vast resources spent on building battlefleets. Battleships were retained by the United States Navy into the Cold War for fire support purposes before being stricken from the U. S. Naval Vessel Register in the 2000s. A ship of the line was a large, unarmored wooden sailing ship which mounted a battery of up to 120 smoothbore guns, from 1794, the alternative term line of battle ship was contracted to battle ship or battleship. The sheer number of guns fired broadside meant a sail battleship could wreck any wooden enemy, holing her hull, knocking down masts, wrecking her rigging, and killing her crew. However, the range of the guns was as little as a few hundred yards. The first major change to the ship of the concept was the introduction of steam power as an auxiliary propulsion system. Steam power was introduced to the navy in the first half of the 19th century, initially for small craft. The French Navy introduced steam to the line of battle with the 90-gun Napoléon in 1850—the first true steam battleship, Napoléon was armed as a conventional ship-of-the-line, but her steam engines could give her a speed of 12 knots, regardless of the wind condition. This was a decisive advantage in a naval engagement. The introduction of steam accelerated the growth in size of battleships, the adoption of steam power was only one of a number of technological advances which revolutionized warship design in the 19th century. The ship of the line was overtaken by the ironclad, powered by steam, protected by metal armor, and armed with guns firing high-explosive shells. In the Crimean War, six ships and two frigates of the Russian Black Sea Fleet destroyed seven Turkish frigates and three corvettes with explosive shells at the Battle of Sinop in 1853

9.
Horsepower
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Horsepower is a unit of measurement of power. There are many different standards and types of horsepower, two common definitions being used today are the mechanical horsepower, which is approximately 746 watts, and the metric horsepower, which is approximately 735.5 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of engines with the power of draft horses. It was later expanded to include the power of other types of piston engines, as well as turbines, electric motors. The definition of the unit varied among geographical regions, most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on January 1,2010, units called horsepower have differing definitions, The mechanical horsepower, also known as imperial horsepower equals approximately 745.7 watts. It was defined originally as exactly 550 foot-pounds per second [745.7 N. m/s), the metric horsepower equals approximately 735.5 watts. It was defined originally as 75 kgf-m per second is approximately equivalent to 735.5 watts, the Pferdestärke PS is a name for a group of similar power measurements used in Germany around the end of the 19th century, all of about one metric horsepower in size. The boiler horsepower equals 9809.5 watts and it was used for rating steam boilers and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit. One horsepower for rating electric motors is equal to 746 watts, one horsepower for rating Continental European electric motors is equal to 735 watts. Continental European electric motors used to have dual ratings, one British Royal Automobile Club horsepower can equal a range of values based on estimates of several engine dimensions. It is one of the tax horsepower systems adopted around Europe, the development of the steam engine provided a reason to compare the output of horses with that of the engines that could replace them. He had previously agreed to take royalties of one third of the savings in coal from the older Newcomen steam engines and this royalty scheme did not work with customers who did not have existing steam engines but used horses instead. Watt determined that a horse could turn a mill wheel 144 times in an hour, the wheel was 12 feet in radius, therefore, the horse travelled 2.4 × 2π ×12 feet in one minute. Watt judged that the horse could pull with a force of 180 pounds-force. So, P = W t = F d t =180 l b f ×2.4 ×2 π ×12 f t 1 m i n =32,572 f t ⋅ l b f m i n. Watt defined and calculated the horsepower as 32,572 ft·lbf/min, Watt determined that a pony could lift an average 220 lbf 100 ft per minute over a four-hour working shift. Watt then judged a horse was 50% more powerful than a pony, engineering in History recounts that John Smeaton initially estimated that a horse could produce 22,916 foot-pounds per minute

10.
Knot (unit)
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The knot is a unit of speed equal to one nautical mile per hour, approximately 1.151 mph. The ISO Standard symbol for the knot is kn, the same symbol is preferred by the IEEE, kt is also common. The knot is a unit that is accepted for use with the SI. Etymologically, the term derives from counting the number of knots in the line that unspooled from the reel of a log in a specific time. 1 international knot =1 nautical mile per hour,1.852 kilometres per hour,0.514 metres per second,1.151 miles per hour,20.254 inches per second,1852 m is the length of the internationally agreed nautical mile. The US adopted the definition in 1954, having previously used the US nautical mile. The UK adopted the international nautical mile definition in 1970, having used the UK Admiralty nautical mile. The speeds of vessels relative to the fluids in which they travel are measured in knots, for consistency, the speeds of navigational fluids are also measured in knots. Thus, speed over the ground and rate of progress towards a distant point are given in knots. Until the mid-19th century, vessel speed at sea was measured using a chip log, the chip log was cast over the stern of the moving vessel and the line allowed to pay out. Knots placed at a distance of 8 fathoms -47 feet 3 inches from each other, passed through a sailors fingers, the knot count would be reported and used in the sailing masters dead reckoning and navigation. This method gives a value for the knot of 20.25 in/s, the difference from the modern definition is less than 0. 02%. On a chart of the North Atlantic, the scale varies by a factor of two from Florida to Greenland, a single graphic scale, of the sort on many maps, would therefore be useless on such a chart. Recent British Admiralty charts have a latitude scale down the middle to make this even easier, speed is sometimes incorrectly expressed as knots per hour, which is in fact a measure of acceleration. Prior to 1969, airworthiness standards for aircraft in the United States Federal Aviation Regulations specified that distances were to be in statute miles. In 1969, these standards were amended to specify that distances were to be in nautical miles. At 11000 m, an airspeed of 300 kn may correspond to a true airspeed of 500 kn in standard conditions. Beaufort scale Hull speed, which deals with theoretical estimates of maximum speed of displacement hulls Knot count Knotted cord Metre per second Orders of magnitude Rope Kemp

11.
16"/50 caliber Mark 7 gun
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The 16/50 caliber Mark 7 – United States Naval Gun was the main armament of the Iowa-class battleships. Due to a lack of communication during design, the Bureau of Ordnance assumed the Iowa class would use the 16/50 Mark 2 guns constructed for the 1920 South Dakota-class battleships, the new 16/50 Mark 7 was designed to resolve this conflict. These guns were 50 calibers long—or 50 times their 16-inch bore diameter which makes the barrels 66.6 feet long, each gun weighed about 239,000 pounds without the breech, or 267,900 pounds with the breech. They fired projectiles weighing from 1,900 to 2,700 pounds at a speed of 2,690 feet per second with a range of up to 24 miles. At maximum range the projectile spent almost 1½ minutes in flight, each turret required a crew of 79 men to operate. The turrets themselves cost US$1.4 million each, to which the cost of the guns had to be added, the turrets were three-gun, not triple, because each barrel could be elevated and fired independently. The ships could fire any combination of their guns, including a broadside of all nine, the turret interiors were subdivided and so designed as to permit the independent loading, elevation and firing of each gun. Each turret was installed with an optical range finder and ballistic analog computer. This permitted the turrets gun captain and crew to engage targets. Contrary to popular belief, the ships did not move sideways noticeably when a broadside was fired, this is simply an illusion. With the enormous mass of the vessel and the effect of the water around the hull the pressure wave generated by the gunfire was felt much more than the slight change in lateral velocity. The guns could be elevated from −5 degrees to +45 degrees, the turrets could rotate about 300 degrees at about 4 degrees per second and could even be fired back beyond the beam, which is sometimes called over the shoulder. Complementing the 16/50 caliber Mark 7 gun was a control computer. At the time the Montana class was set to begin construction, the results of this advance were telling, the rangekeeper was able to track and fire at targets at a greater range and with increased accuracy. This gave the US Navy a major advantage in World War II, the Mark 7 gun was originally intended to fire the relatively light 2, 240-pound Mark 5 armor-piercing shell. However, the system for these guns was redesigned to use the super-heavy 2. The North Carolina and South Dakota classes could also fire the 2, 700-pound Mark 8 shell, although with a shorter range, the Mark 6 gun was lighter than the Mark 7, which helped both battleship classes to conform to the limits of the Washington Naval Treaty. Only the Yamato-class super-battleships could throw more weight, a maximum charge consists of six silk bags–hence the term bag gun–each filled with 110 pounds of propellant

12.
5"/38 caliber gun
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The Mark 12 5/38 caliber gun was a US naval gun. The gun was installed into Single Purpose and Dual Purpose mounts used primarily by the US Navy, the 38 caliber barrel was a mid-length compromise between the previous United States standard 5/51 low-angle gun and 5/25 anti-aircraft gun. The increased barrel length provided greatly improved performance in both anti-aircraft and anti-surface roles compared to the 5/25 gun, however, except for the barrel length and the use of semi-fixed ammunition, the 5/38 gun was derived from the 5/25 gun. Both weapons had power ramming, which enabled rapid fire at high angles against aircraft, the 5/38 entered service on USS Farragut, commissioned in 1934. The base ring mount, which improved the rate of fire, entered service on USS Gridley. Even this advanced system required nearly 100 rounds of ammunition expenditure per aircraft kill, however, the planes were normally killed by shell fragments and not direct hits, barrage fire was used, with many guns firing in the air at the same time. Base ring mounts with integral hoists had a rate of fire of 15 rounds per minute per barrel, however. On pedestal and other mounts lacking integral hoists,12 to 15 rounds per minute was the rate of fire, useful life expectancy was 4600 effective full charges per barrel. The 5/38 cal gun was mounted on a large number of US Navy ships in the World War II era. It was backfitted to many of the World War I-era battleships during their wartime refits and it has left active US Navy service, but it is still on mothballed ships of the United States Navy reserve fleets. It is also used by a number of nations who bought or were given US Navy surplus ships, each mount carries one or two Mk 12 5/38cal Gun Assemblies. The gun assembly shown is used in single mounts, and it is the gun in twin mounts. It is loaded from the left side, the left gun in twin mounts is the mirror image of the right gun, and it is loaded from the right side. The Mk12 gun assembly weighs 3,990 lb, the major Mk12 Gun Assembly characteristics are,158 Semi-automatic During recoil, some of the recoil energy is stored in the counter-recoil system. That stored energy is used during counter-recoil to prepare the gun for the next round, the firing pin is cocked, the breech is opened, the spent powder case is ejected, and the bore is air cleaned. Hand loaded A Projectile-Man and a Powder-Man are stationed at each gun assembly and their job is to move the round, consisting of a projectile and a powder case, from the hoists to the rammer tray, and then start the ram cycle. The hydraulically driven Rammer Spade, called the Power Spade in that picture, is at the back of the Rammer Tray, if the multiple names of the Spade is confusing, look at this footnote. Vertical sliding-wedge breech block The breech block closes the chamber behind the powder case and it also holds the firing pin assembly

13.
Bofors 40 mm gun
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The Bofors 40 mm gun, often referred to simply as the Bofors gun, is an anti-aircraft/multi-purpose autocannon designed in the 1930s by the Swedish arms manufacturer AB Bofors. It was one of the most popular medium-weight anti-aircraft systems during World War II, a small number of these weapons remain in service to this day, and saw action as late as the Gulf War. In the post-war era the original design was not suitable for action against jet powered aircraft, so Bofors introduced a new model of more power. In spite of sharing almost nothing with the design other than the calibre and the distinctive conical flash hider. Although not as popular as the original L/60 model, the L/70 remains in service to this day, especially as a weapon for light armored vehicles. Bofors itself has been part of BAE Systems AB since March 2005, the Swedish Navy purchased a number of 2 pounder Pom-Poms from Vickers as anti-aircraft guns in 1922. The Navy approached Bofors about the development of a capable replacement. Bofors signed a contract in late 1928, Bofors produced a gun that was a smaller version of a 57 mm semi-automatic gun developed as an anti-torpedo boat weapon in the late 19th century by Finspong. Their first test gun was a re-barreled Nordenfelt version of the Finspong gun, testing of this gun in 1929 demonstrated that a problem existed feeding the weapon in order to maintain a reasonable rate of fire. A mechanism that was enough to handle the stresses of moving the large round was too heavy to move quickly enough to fire rapidly. One attempt to solve this problem used zinc shell cases that burned up when fired and this proved to leave heavy zinc deposits in the barrel, and had to be abandoned. This seemed to be the solution they needed, improving firing rates to a level. During this period Krupp purchased a share of Bofors. Krupp engineers started the process of updating the Bofors factories to use equipment and metallurgy. The prototype was completed and fired in November 1931, and by the middle of the month it was firing strings of two and three rounds. Changes to the mechanism were all that remained, and by the end of the year it was operating at 130 rounds per minute. Continued development was needed to turn it into a suitable for production. Since acceptance trials had been passed the year before, this known as the 40 mm akan M/32

14.
Oerlikon 20 mm cannon
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The Oerlikon 20 mm cannon is a series of autocannons, based on an original German 20 mm Becker design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II, and many still in use today. During World War I, the German Reinhold Becker developed a 20 mm caliber cannon and this used a 20x70 RB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a scale as an aircraft gun on Luftstreitkräfte warplanes. Because the Treaty of Versailles banned further production of weapons in Germany. SEMAG continued development of the weapon, and in 1924 had produced the SEMAG L, the Oerlikon firm, named after the Zürich suburb where it was based, then acquired all rights to the weapon, plus the manufacturing equipment and the employees of SEMAG. In 1927 the Oerlikon S was added to the product line. This fired a larger cartridge to achieve a muzzle velocity of 830 m/s, at the cost of increased weight. The purpose of development was to improve the performance of the gun as an anti-tank and anti-aircraft weapon. An improved version known as the 1S followed in 1930, three sizes of gun with their different ammunition and barrel length, but very similar mechanisms, continued to be developed in parallel. In 1930 Oerlikon reconsidered the application of its gun in aircraft and introduced the AF and AL, designed to be used in flexible mounts, the 15-round box magazine used by earlier versions of the gun was replaced by drum magazine holding 15 or 30 rounds. In 1935 it made an important step by introducing a series of guns designed to be mounted in or on the wings of fighter aircraft, designated with FF for Flügelfest meaning wing-mounted, these weapons were again available in the three sizes, with designations FF, FFL and FFS. The FF fired a larger cartridge than the AF, 20x72RB. The FF weighed 24 kg and achieved a velocity of 550 to 600 m/s with a rate of fire of 520 rpm. The FFL of 30 kg fired a projectile at a velocity of 675 m/s with a rate of fire of 500 rpm. And the FFS, which weighed 39 kg, delivered a high velocity of 830 m/s at a rate of fire of 470 rpm. Apart from changes to the design of the guns for wing-mounting and remote control, for the FF series drum sizes of 45,60,75 and 100 rounds were available, but most users chose the 60-round drum. The 1930s were a period of global re-armament, and a number of foreign firms took licenses for the Oerlikon family of aircraft cannon

15.
Tomahawk (missile)
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The Tomahawk is a long-range, all-weather, subsonic cruise missile named after the Native American axe. Introduced by McDonnell Douglas in the 1970s, it was designed as a medium to long-range. It has been improved several times, and after corporate divestitures, some Tomahawks were also manufactured by General Dynamics. The Tomahawk missile family consists of a number of subsonic, jet engine-powered missiles designed to attack a variety of surface targets, although a number of launch platforms have been deployed or envisaged, only sea launched variants are currently in service. Tomahawk has a design, allowing a wide variety of warhead, guidance. The Tomahawk project was awarded to Applied Physics Laboratory in Laurel. James H. Walker led a team of scientists to design, the original design with advanced technology is still used today. There have been variants of the BGM-109 Tomahawk employing various types of warheads. BGM-109A Tomahawk Land Attack Nuclear - Not deployed, bGM-109A Tomahawk Land Attack Missile – Nuclear with a W80 thermonuclear weapon. Retired from service sometime between 2010 and 2013, rGM/UGM-109B Tomahawk Anti Ship Missile – active radar homing anti-ship missile variant, withdrawn from service in the 1990s. BGM-109C Tomahawk Land Attack Missile – Conventional with a unitary warhead and this was initially a modified Bullpup warhead. BGM-109D Tomahawk Land Attack Missile – Dispenser with cluster munitions, rGM/UGM-109E Tomahawk Land Attack Missile – improved version of the TLAM-C. BGM-109G Ground Launched Cruise Missile – with a W84 nuclear warhead, aGM-109H/L Medium Range Air to Surface Missile – a shorter range, turbojet powered ASM with cluster munitions, never entered service, cost US$569,000. Many of the versions were converted into TLAMs at the end of the Cold War. The Block III TLAMs that entered service in 1993 can fly farther, Block IV TLAMs are completely redesigned with an improved turbofan engine. The F107-402 engine provided the new BLK III with a throttle control and this engine also provided better fuel economy. The Block IV TLAMs have enhanced capabilities and are equipped with a real-time targeting system for striking fleeting targets. A major improvement to the Tomahawk is network-centric warfare-capabilities, using data from sensors to find its target

16.
Harpoon (missile)
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The Harpoon is an all-weather, over-the-horizon, anti-ship missile system, developed and manufactured by McDonnell Douglas. In 2004, Boeing delivered the 7, 000th Harpoon unit since the introduction in 1977. The missile system has also further developed into a land-strike weapon. The regular Harpoon uses active homing, and a low-level. The missiles launch platforms include, Fixed-wing aircraft Surface ships Submarines, Coastal defense batteries, in 1965 the United States Navy began studies for a missile in the 45 kilometres range class for use against surfaced submarines. The name Harpoon was assigned to the project, Harpoon was primarily developed for use on US Navy warships such as the Ticonderoga-class cruiser as their principal anti-ship weapon system. The Harpoon was purchased by many American allies, including Pakistan, Japan, Singapore, South Korea, Taiwan, the United Arab Emirates and most NATO countries. The Royal Australian Air Force is capable of firing AGM-84 series missiles from its F/A-18F Super Hornets, F/A-18A/B Hornets, and AP-3C Orion aircraft, the Royal Australian Navy deploys the Harpoon on major surface combatants and in the Collins-class submarines. The Spanish Air Force and the Chilean Navy are also AGM-84D customers, and they deploy the missiles on ships, and F/A-18s, F-16s. The British Royal Navy deploys the Harpoon on several types of surface ship, the Royal Canadian Navy carries Harpoon missiles on its Halifax-class frigates. The Republic of Singapore Air Force also operates five modified Fokker 50 Maritime Patrol Aircraft which are fitted with the sensors needed to fire the Harpoon missile, the Pakistani Navy carries the Harpoon missile on its frigates and P-3C Orions. The Turkish Navy carries Harpoons on surface warships and Type 209 submarines, the Turkish Air Force will be armed with the SLAM-ER. S. Navy Knox-class frigates and the four former USN Kidd-class destroyers which have sold to Taiwan. The two Zwaardvis/Hai Lung submarines and 12 P-3C Orion aircraft can use the missile. The Block 1 missiles were designated AGM/RGM/UGM-84A in US service and UGM-84B in the UK, Block 1B standard missiles were designated AGM/RGM/UGM-84C, Block 1C missiles were designated AGM/RGM/UGM-84D. This version featured a fuel tank and re-attack capability, but was not produced in large numbers because its intended mission was considered to be unlikely following the events of 1991–92. Block 1D missiles were designated RGM/AGM-84F, Block 1G missiles AGM/RGM/UGM-84G, the original SLAM-ER missiles were designated AGM-84H and later ones the AGM-84K. Block 1J was a proposal for an upgrade, AGM/RGM/UGM-84J Harpoon

17.
Phalanx weapon system
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The Phalanx CIWS is a close-in weapon system for defense against anti-ship missiles. It was designed and manufactured by the General Dynamics Corporation, Pomona Division, a land based variant, known as C-RAM, has recently been deployed in a short range missile defense role, to counter incoming rockets and artillery fire. Because of their distinctive barrel-shaped radome and their nature of operation. The Phalanx Close-In Weapons System was developed as the last line of automated weapons defense against anti-ship missiles and attacking aircraft, including high-g, subsequently, the Phalanx Operational Suitability Model successfully completed its Operational Test and Evaluation on board the destroyer USS Bigelow in 1977. The model exceeded operational maintenance, reliability, and availability specifications, another evaluation successfully followed, and the weapon system was approved for production in 1978. Phalanx production started with orders for 23 USN and 14 foreign military systems, the first ship fully fitted out was the aircraft carrier USS Coral Sea in 1980. The Navy began placing CIWS systems on non-combatant vessels in 1984 and this proven system was combined with a purpose-made mounting, capable of fast elevation and traverse speeds, to track incoming targets. Due to this nature, Phalanx is ideal for support ships. The entire unit has a mass between 12,400 to 13,500 lb, due to the continuing evolution of both threats and computer technology, the Phalanx system has, like most military systems, been developed through a number of different configurations. The basic style is the Block 0, equipped with first-generation, solid-state electronics, the Block 1 upgrade offered various improvements in radar, ammunition, computing power, rate of fire, and an increase in maximum engagement elevation to +70 degrees. These improvements were intended to increase the systems capability against emerging Russian supersonic anti-ship missiles, Block 1A introduced a new computer system to counter more maneuverable targets. The Block 1B PSuM adds a forward-looking infrared sensor to make the weapon effective against surface targets and this addition was developed to provide ship defense against small vessel threats and other floaters in littoral waters and to improve the weapons performance against slower low-flying aircraft. The FLIRs capability is also of use against low-observability missiles and can be linked with the RIM-116 Rolling Airframe Missile system to increase RAM engagement range, the Block 1B also allows for an operator to visually identify and target threats. As the system manager, the U. S. Navy is in the process of upgrading all their Phalanx systems to the Block 1B configuration. All U. S Navy Phalanx systems are scheduled for upgrade to Block 1B by the end of FY2015, another system upgrade is the Phalanx 1B Baseline 2 radar to improve detection performance, increase reliability, and reduce maintenance. S. Navy Phalanx system-equipped vessels by FY2019, the Block 1B is also used by other navies, such as Canada, Portugal, Japan, Egypt, Bahrain, and the UK. In April 2017, Raytheon tested a new gun for the Phalanx allowing the system to fire at varying rates to conserve ammunition. The new design replaces the pneumatic motor, compressor, and storage tanks, reducing weight by 180 lb while increasing reliability

18.
Belt armor
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Belt armor is a layer of heavy metal armor plated onto or within the outer hulls of warships, typically on battleships, battlecruisers and cruisers, and aircraft carriers. The belt armor is designed to prevent projectiles from penetrating to the heart of a warship, typically, the main armor belt covers the warship from its main deck down to some distance below the waterline. If, instead of forming the hull, the armor belt is built inside the hull, it is installed at a sloped angle for improved protection. Furthermore, the spaces around the main belt in some designs were filled with storage tanks that could contain fuel oil, seawater. The liquids in these tanks absorb or scatter much of the force of warheads. To deal with the leakage from the tanks and incoming seawater and this multilayer design is featured in the cross-sectional drawings of Tirpitz and King George V. In combat, a warship can be seriously damaged underwater not only by torpedoes, to improve protection against both shells and torpedoes, an air space can be added between the armor belt and the hull to increase the buoyancy of the warship. Some kinds of naval warships have belt armor thinner than actually necessary for protection against projectiles and this is common especially with battlecruisers, battleships, and aircraft carriers to reduce their weight, thus increasing their acceleration and speed. Another possible reason is to meet treaty restrictions on ship displacement, one such method is all-or-nothing armoring, where belt armor is stripped from areas deemed non-vital to the functioning of the ship in battle. Agility gained from such processes are an asset to offensive warships that seek to quickly bring their heavy striking power to the enemy. In carriers, the maneuverability is exploited when deploying and recovering aircraft, since planes take off and land most easily when flying into the wind, the aircraft carrier steams rapidly into the wind in both maneuvers, making take-off and landing safer and easier. S. Comparison of WW2 battleship armor schemes Torpedo belt Protected cruiser Armored cruiser

19.
Bulkhead (partition)
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A bulkhead is an upright wall within the hull of a ship or within the fuselage of an aeroplane. Other kinds of elements within a ship are decks and deckheads. The word bulki meant cargo in Old Norse, sometime in the 15th century sailors and builders in Europe realized that walls within a vessel would prevent cargo from shifting during passage. In shipbuilding, any vertical panel was called a head, so walls installed abeam in a vessels hull were called bulkheads. Now, the term applies to every vertical panel aboard a ship. Bulkhead partitions are considered to have been a feature of Chinese junks, song Dynasty author Zhu Yu wrote in his book of 1119 that the hulls of Chinese ships had a bulkhead build. The 5th-century book Garden of Strange Things by Liu Jingshu mentioned that a ship could allow water to enter the bottom without sinking, texts written by Western writers such as Marco Polo, Niccolò Da Conti, and Benjamin Franklin describe the bulkhead partitions of East Asian shipbuilding. Bulkhead partitions became widespread in Western shipbuilding during the early 19th century, a 19th century book on shipbuilding attributes the introduction of watertight bulkheads to Charles Wye Williams, known for his steamships. Some bulkheads and decks are fire-resistance rated to achieve compartmentalisation, a fire protection measure. On an aircraft, bulkheads divide the cabin into multiple areas, openings in fire-resistance rated bulkheads and decks must be firestopped to restore the fire-resistance ratings that would otherwise be compromised, if the openings were left unsealed. The authority having jurisdiction for such measures varies depending upon the flag of the ship, merchant vessels are typically subject to the regulations and inspections of the Coast Guards of the flag country. Combat ships are subject to the set out by the navy of the country that owns the ship. The term was applied to other vehicles, such as railroad cars, hopper cars, trams, automobiles, aircraft or spacecraft, as well as to containers, intermediate bulk containers. In some of these cases bulkheads are airtight to prevent air leakage or the spread of a fire, the term may also be used for the end walls of bulkhead flatcars. Mechanically, a partition or panel through which pass, or a connector designed to pass through a partition. In architecture the term is used to denote any boxed in beam or other downstand from a ceiling. Head strikes on these elements are commonplace hence in architecture any overhead downstand element comes to be referred to as a bulkhead

20.
Barbette
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Barbettes are several types of gun emplacement in terrestrial fortifications or on naval ships. In recent naval usage, a barbette is a circular armour support for a heavy gun turret. This evolved from earlier forms of gun protection that led to the pre-dreadnought. The former gives better angles of fire but less protection than the latter, the disappearing gun was a variation on the barbette gun, it consisted of a heavy gun on a carriage that would retract behind a parapet or into a gunpit for reloading. They were primarily used in coastal defences, but saw use in a handful of warships. The term is used for certain aircraft gun mounts. By the late 1880s, all three systems were replaced with a hybrid system that combined the benefits of both types. The heavily-armored vertical tube that supported the new gun mount was referred to as a barbette, american authors generally refer to such mounts simply as tail guns or tail gun turrets. The use of barbette mountings originated in ground fortifications, the term originally referred to a raised platform on a rampart for one or more guns, enabling them to be fired over a parapet. This gave rise to the phrase en barbette, which referred to a gun placed to fire over a parapet, rather than through an embrasure, while an en barbette emplacement offered wider arcs of fire, it also exposed the guns crew to greater danger from hostile fire. In addition, since the position would be higher than a casemate position—that is. Fortifications in the 19th century typically employed both casemate and barbette emplacements, the type was usually used for coastal defence guns. Later heavy coastal guns were protected in hybrid installation, with wide casemate with cantilevered overhead cover partially covering a barbette mount. Following the introduction of ironclad warships in the early 1860s, naval designers grappled with the problem of mounting guns in the most efficient way possible. The first generation of ironclads employed the same arrangement as the old ship of the line. This was particularly important to designers, since the tactic of ramming was revived following its successful employment at the decisive Austrian victory at the Battle of Lissa in 1866, ramming required a ship to steam directly at its opponent, which greatly increased the importance of end-on fire. Designers such as Cowper Phipps Coles and John Ericsson designed the first gun turrets in the 1860s, in the 1870s, designers began to experiment with an en barbette type of mounting. The barbette was a fixed armoured enclosure protecting the gun, the barbette could take the form of a circular or elongated ring of armour around the rotating gun mount over which the guns fired

21.
Gun turret
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A gun turret is a location from which weapons can be fired that affords protection, visibility, and some cone of fire. Rotating gun turrets have the protection, the weapon, and its crew rotate, when this meaning of the word turret started being used at the beginning of the 1860s, turrets were normally cylindrical. Barbettes were an alternative to turrets, with a barbette the protection was fixed, in the 1890s, armoured hoods were added to barbettes, these rotated with the platform. By the early 20th Century, these hoods were known as turrets, modern warships have gun-mountings described as turrets, though the protection on them is limited to protection from the weather. They may be manned or remotely controlled and are most often protected to some degree, the protection provided by the turret may be against battle damage, the weather conditions, general environment in which the weapon or its crew will be operating. A small turret, or sub-turret set on top of a one, is called a cupola. The term cupola is used for a rotating turret that carries a sighting device rather than weaponry. Before the development of large-calibre, long-range guns in the mid-19th century, firepower was provided by a large number of guns, each of which could traverse only in a limited arc. Additionally casemate mounts had to be recessed into the side of a vessel to afford a wide arc of fire, designs for a rotating gun turret date back to the late 18th century. The Lady Nancy proved a success and Coles patenting his rotating turret design after the war. Coless aim was to create a ship with the greatest possible all round arc of fire, the Admiralty accepted the principle of the turret gun as a useful innovation, and incorporated it into other new designs. Coles submitted a design for a ship having ten domed turrets each housing two large guns, the design was rejected as impractical, although the Admiralty remained interested in turret ships and instructed its own designers to create better designs. Coles enlisted the support of Prince Albert, who wrote to the first Lord of the Admiralty, in January 1862, the Admiralty agreed to construct a ship, the HMS Prince Albert which had four turrets and a low freeboard, intended only for coastal defence. While Coles designed the turrets the ship was the responsibility of the chief Constructor Isaac Watts, another ship using Coles turret designs, HMS Royal Sovereign, was completed in August 1864. Its existing broadside guns were replaced with four turrets on a flat deck, early ships like the Royal Sovereign had little sea-keeping qualities being limited to coastal waters. Sir Edward James Reed, went on to design and build HMS Monarch, laid down in 1866 and completed in June 1869, it carried two turrets, although the inclusion of a forecastle and poop prevented the turret guns firing fore and aft. The gun turret was independently invented by the Swedish inventor John Ericsson in America, Ericsson designed the USS Monitor in 1861, its most prominent feature being a large cylindrical gun turret mounted amidships above the low-freeboard upper hull, also called the raft. This extended well past the sides of the lower, more traditionally shaped hull, a small armoured pilot house was fitted on the upper deck towards the bow, however, its position prevented Monitor from firing her guns straight forward

22.
Deck (ship)
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A deck is a permanent covering over a compartment or a hull of a ship. On a boat or ship, the primary or upper deck is the structure that forms the roof of the hull, strengthening it. Decks for some purposes have specific names, the main purpose of the upper or primary deck is structural, and only secondarily to provide weather-tightness and support people and equipment. The deck serves as the lid to the box girder which is the hull. It resists tension, compression, and racking forces, the decks scantling is usually the same as the topsides, or might be heavier if the deck is expected to carry heavier loads. The deck will be reinforced around deck fittings such as the capstan, cleats, on ships with more than one level, deck refers to the level itself. The actual floor surface is called the sole, the term refers to a structural member tying the ships frames or ribs together over the keel. In modern ships, the decks are usually numbered from the primary deck. So the first deck below the deck will be #2. Some merchant ships may alternatively designate decks below the deck, usually machinery spaces, by numbers. Ships may also call decks by common names, or may invent fanciful and romantic names for a deck or area of that specific ship. Equipment mounted on deck, such as the wheel, binnacle, fife rails. Eastern designs developed earlier, with efficient middle decks and minimalist fore, in vessels having more than one deck there are various naming conventions, numerically, alphabetically, etc. However, there are various common historical names and types of decks,01 level is the term used in naval services to refer to the deck above the main deck. The next higher decks are referred to as the 02 level, the 03 level, afterdeck an open deck area toward the stern-aft. Berth deck, A deck next below the gun deck, where the hammocks of the crew are slung, Boat deck, Especially on ships with sponsons, the deck area where lifeboats or the ships gig are stored. Boiler deck, The passenger deck above the vessels boilers, may also refer to the deck of a bridge. Flight deck, A deck from which aircraft take off or land, flush deck, Any continuous unbroken deck from stem to stern

23.
Floatplane
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A floatplane is a type of seaplane, with one or more slender pontoons mounted under the fuselage to provide buoyancy. By contrast, a flying boat uses its fuselage for buoyancy, either type of seaplane may also have landing gear suitable for land, making the vehicle an amphibious aircraft. Since World War II and the advent of helicopters, advanced aircraft carriers and land-based aircraft and this, coupled with the increased availability of civilian airstrips, have greatly reduced the number of flying boats being built. These floatplanes have found their niche as one type of plane, for light duty transportation to lakes. They may operate on a basis, provide scheduled service, or be operated by residents of the area for private. Floatplanes have often been derived from land-based aircraft, with fixed floats mounted under the fuselage instead of retractable undercarriage, attaching floats to a landplane also allows for much larger production volumes to pay for the development and production of the small number of aircraft operated from water. Additionally, on all but the largest seaplanes, floatplane wings usually offer more clearance over obstacles, such as docks, a typical single engine flying boat is unable to bring the hull alongside a dock for loading while most floatplanes are able to do so. Floats inevitably impose extra drag and weight, rendering floatplanes slower and less manoeuvrable during flight, with a rate of climb. Some early twin float designs had additional wingtip stabilizing floats, by comparison, dual floats restrict handling, often to waves as little as one foot in height. However, twin float designs facilitate mooring and boarding, and – in the case of torpedo bombers – leave the free to carry a torpedo. Popular Science, February 1945, pp. 134–135

24.
Helicopter
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A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and these attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL aircraft cannot perform. English language nicknames for helicopter include chopper, copter, helo, heli, Helicopters were developed and built during the first half-century of flight, with the Focke-Wulf Fw 61 being the first operational helicopter in 1936. Some helicopters reached limited production, but it was not until 1942 that a helicopter designed by Igor Sikorsky reached full-scale production, with 131 aircraft built. Though most earlier designs used more than one rotor, it is the single main rotor with anti-torque tail rotor configuration that has become the most common helicopter configuration. Tandem rotor helicopters are also in use due to their greater payload capacity. Coaxial helicopters, tiltrotor aircraft, and compound helicopters are all flying today, quadcopter helicopters pioneered as early as 1907 in France, and other types of multicopter have been developed for specialized applications such as unmanned drones. The earliest references for vertical flight came from China, since around 400 BC, Chinese children have played with bamboo flying toys. This bamboo-copter is spun by rolling a stick attached to a rotor, the spinning creates lift, and the toy flies when released. The 4th-century AD Daoist book Baopuzi by Ge Hong reportedly describes some of the ideas inherent to rotary wing aircraft, designs similar to the Chinese helicopter toy appeared in Renaissance paintings and other works. In the 18th and early 19th centuries Western scientists developed flying machines based on the Chinese toy. It was not until the early 1480s, when Leonardo da Vinci created a design for a machine that could be described as an aerial screw, that any recorded advancement was made towards vertical flight. His notes suggested that he built flying models, but there were no indications for any provision to stop the rotor from making the craft rotate. As scientific knowledge increased and became accepted, people continued to pursue the idea of vertical flight. In July 1754, Russian Mikhail Lomonosov had developed a small coaxial modeled after the Chinese top but powered by a spring device. It was powered by a spring, and was suggested as a method to lift meteorological instruments. Sir George Cayley, influenced by a fascination with the Chinese flying top, developed a model of feathers, similar to that of Launoy and Bienvenu. By the end of the century, he had progressed to using sheets of tin for rotor blades and his writings on his experiments and models would become influential on future aviation pioneers

25.
Lead ship
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The lead ship, name ship, or class leader is the first of a series or class of ships all constructed according to the same general design. The term is applicable to ships and larger civilian craft. Large ships are complicated internally and may take as much as five to ten years to construct, any changes or advances that are available when building a ship are likely to be included, so it is rare to have two that are identical. Constructing one ship is likely to reveal better ways of doing things. The second and later ships are often started before the first one is completed, launched and tested, the improvements will sometimes be retrofitted to the lead ship. Larger civilian craft, such as Sun Princess, the ship of the Sun-class cruise ships. The same custom is followed in fiction, the Constitution-class cruiser is the basis for the Enterprise of Star Trek. Example of a lead ship announcement from US Navy USS Pennsylvania BB-38

26.
United States Navy
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The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U. S. Navy is the largest, most capable navy in the world, the U. S. Navy has the worlds largest aircraft carrier fleet, with ten in service, two in the reserve fleet, and three new carriers under construction. The service has 323,792 personnel on duty and 108,515 in the Navy Reserve. It has 274 deployable combat vessels and more than 3,700 operational aircraft as of October 2016, the U. S. Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was effectively disbanded as a separate entity shortly thereafter. It played a role in the American Civil War by blockading the Confederacy. It played the role in the World War II defeat of Imperial Japan. The 21st century U. S. Navy maintains a global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean. The Navy is administratively managed by the Department of the Navy, the Department of the Navy is itself a division of the Department of Defense, which is headed by the Secretary of Defense. The Chief of Naval Operations is an admiral and the senior naval officer of the Department of the Navy. The CNO may not be the highest ranking officer in the armed forces if the Chairman or the Vice Chairman of the Joint Chiefs of Staff. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression, the United States Navy is a seaborne branch of the military of the United States. The Navys three primary areas of responsibility, The preparation of naval forces necessary for the prosecution of war. The development of aircraft, weapons, tactics, technique, organization, U. S. Navy training manuals state that the mission of the U. S. Armed Forces is to prepare and conduct prompt and sustained combat operations in support of the national interest, as part of that establishment, the U. S. Navys functions comprise sea control, power projection and nuclear deterrence, in addition to sealift duties. It follows then as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, the Navy was rooted in the colonial seafaring tradition, which produced a large community of sailors, captains, and shipbuilders. In the early stages of the American Revolutionary War, Massachusetts had its own Massachusetts Naval Militia, the establishment of a national navy was an issue of debate among the members of the Second Continental Congress. Supporters argued that a navy would protect shipping, defend the coast, detractors countered that challenging the British Royal Navy, then the worlds preeminent naval power, was a foolish undertaking. Commander in Chief George Washington resolved the debate when he commissioned the ocean-going schooner USS Hannah to interdict British merchant ships, and reported the captures to the Congress

27.
Montana-class battleship
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The Montana-class battleships of the United States Navy were planned as successors to the Iowa class, being slower but larger, better armored, and having superior firepower. Intended armament would have been 12 16-inch Mark 7 guns in four 3-gun turrets, preliminary design work for the Montana class began before the US entry into World War II. The first two vessels were approved by Congress in 1939 following the passage of the Second Vinson Act, the Japanese attack on Pearl Harbor delayed construction of the Montana class. The success of carrier combat at the Battle of the Coral Sea and, to a greater extent, consequently, the US Navy chose to cancel the Montana class in favor of more urgently needed aircraft carriers, amphibious and anti-submarine vessels. Because the Iowas were fast enough to escort the new Essex-class aircraft carriers, their orders were retained, four additional battleships were approved for construction in 1940, with the last two intended to be the first ships of the Montana class. The Navy, mindful of the construction of Japans Yamato-class battleships, had been working on a 58. Preliminary planning for the Montana-class battleships took place in 1939, when the carrier was still considered strategically less important than the battleship. The Navy began designing a 65, 000-ton battleship to counter the threat posed by the Yamato-class battleships of the Imperial Japanese Navy, although the Navy knew little about the Yamato class, the new Japanese battleships were rumored to have a main gun battery of 18 inches. Initially, plans were drawn for a 45, 000-ton US battleship, but after evaluation, the Battleship Design Advisory Board increased the displacement of the planned ship to 58,000 tons. After debate at the board about whether the Montana class should be fast, achieving the high 33 kn speed of the Iowa class, or up-gunned and up-armored. The entire Montana class was suspended in May 1942, before any of their keels had been laid, five ships of the Montana class were authorized on 19 July 1940, but they were suspended indefinitely until being canceled on 21 July 1943. The ships were to be built at the New York Navy Yard, Philadelphia Navy Yard, Montana was planned to be the lead ship of the class. She was the ship to be named in honor of the 41st state. Both the earlier battleship, BB-51, and BB-67 were canceled, Ohio was to be the second Montana-class battleship. She was to be named in honor of the 17th state, Ohio would have been the fourth ship to bear that name had she been commissioned. Maine was to be the third Montana-class battleship and she was to be named in honor of the 23rd state, and was assigned to the New York Navy Yard. Maine would have been the ship to bear that name had she been commissioned. New Hampshire was to be the fourth Montana-class battleship, and was to be named in honor of the ninth state and she was assigned to the New York Navy Yard, and would have been the third ship to bear that name had she been commissioned

28.
Franklin D. Roosevelt
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Franklin Delano Roosevelt, commonly known as FDR, was an American statesman and political leader who served as the 32nd President of the United States from 1933 until his death in 1945. A Democrat, he won a record four presidential elections and emerged as a figure in world events during the mid-20th century. He directed the United States government during most of the Great Depression and he is often rated by scholars as one of the three greatest U. S. Presidents, along with George Washington and Abraham Lincoln. Roosevelt was born in 1882 to an old, prominent Dutch family from Dutchess County and he attended the elite educational institutions of Groton School, Harvard College, and Columbia Law School. At age 23 in 1905, he married Eleanor Roosevelt, and he entered politics in 1910, serving in the New York State Senate, and then as Assistant Secretary of the Navy under President Woodrow Wilson. In 1920, Roosevelt was presidential candidate James M. Coxs running mate and he was in office from 1929 to 1933 and served as a reform governor, promoting the enactment of programs to combat the depression besetting the United States at the time. In the 1932 presidential election, Roosevelt defeated incumbent Republican president Herbert Hoover in a landslide to win the presidency, Roosevelt took office while in the United States was in the midst of the worst economic crisis in its history. Energized by his victory over polio, FDR relied on his persistent optimism and activism to renew the national spirit. He created numerous programs to support the unemployed and farmers, and to labor union growth while more closely regulating business. His support for the repeal of Prohibition in 1933 added to his popularity, the economy improved rapidly from 1933–37, but then relapsed into a deep recession in 1937–38. The bipartisan Conservative Coalition that formed in 1937 prevented his packing the Supreme Court, when the war began and unemployment ended, conservatives in Congress repealed the two major relief programs, the WPA and CCC. However, they kept most of the regulations on business, along with several smaller programs, major surviving programs include the Securities and Exchange Commission, the Wagner Act, the Federal Deposit Insurance Corporation and Social Security. His goal was to make America the Arsenal of Democracy, which would supply munitions to the Allies, in March 1941, Roosevelt, with Congressional approval, provided Lend-Lease aid to Britain and China. He supervised the mobilization of the U. S. economy to support the war effort, as an active military leader, Roosevelt implemented a war strategy on two fronts that ended in the defeat of the Axis Powers and initiate the development of the worlds first atomic bomb. His work also influenced the creation of the United Nations. Roosevelts physical health declined during the war years, and he died 11 weeks into his fourth term. One of the oldest Dutch families in New York State, the Roosevelts distinguished themselves in other than politics. One ancestor, Isaac Roosevelt, had served with the New York militia during the American Revolution, Roosevelt attended events of the New York society Sons of the American Revolution, and joined the organization while he was president

29.
Winston Churchill
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Sir Winston Leonard Spencer-Churchill KG OM CH TD PC DL FRS RA was a British statesman who was the Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955. Churchill was also an officer in the British Army, a historian. He won the Nobel Prize in Literature in 1953 for his overall, in 1963, he was the first of only eight people to be made an honorary citizen of the United States. Churchill was born into the family of the Dukes of Marlborough and his father, Lord Randolph Churchill, was a charismatic politician who served as Chancellor of the Exchequer, his mother, Jennie Jerome, was an American socialite. As a young officer, he saw action in British India, the Anglo–Sudan War. He gained fame as a war correspondent and wrote books about his campaigns, at the forefront of politics for fifty years, he held many political and cabinet positions. Before the First World War, he served as President of the Board of Trade, Home Secretary, during the war, he continued as First Lord of the Admiralty until the disastrous Gallipoli Campaign caused his departure from government. He then briefly resumed active service on the Western Front as commander of the 6th Battalion of the Royal Scots Fusiliers. He returned to government under Lloyd George as Minister of Munitions, Secretary of State for War, Secretary of State for Air, at the outbreak of the Second World War, he was again appointed First Lord of the Admiralty. Following the resignation of Neville Chamberlain on 10 May 1940, Churchill became Prime Minister and he led Britain as Prime Minister until victory over Nazi Germany had been secured. After the Conservative Party suffered a defeat in the 1945 general election. He publicly warned of an Iron Curtain of Soviet influence in Europe, after winning the 1951 election, Churchill again became Prime Minister. His second term was preoccupied by foreign affairs, including the Malayan Emergency, Mau Mau Uprising, Korean War, domestically his government laid great emphasis on house-building. Churchill suffered a stroke in 1953 and retired as Prime Minister in 1955. Upon his death aged ninety in 1965, Elizabeth II granted him the honour of a state funeral and his highly complex legacy continues to stimulate intense debate amongst writers and historians. Born into the family of the Dukes of Marlborough, a branch of the noble Spencer family, Winston Leonard Spencer-Churchill, like his father. His ancestor George Spencer had changed his surname to Spencer-Churchill in 1817 when he became Duke of Marlborough, to highlight his descent from John Churchill, Churchill was born on 30 November 1874, two months prematurely, in a bedroom in Blenheim Palace, Woodstock, Oxfordshire. From age two to six, he lived in Dublin, where his grandfather had been appointed Viceroy, Churchills brother, John Strange Spencer-Churchill, was born during this time in Ireland

30.
Josef Stalin
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Joseph Vissarionovich Stalin was the leader of the Soviet Union from the mid-1920s until his death in 1953. Holding the post of the General Secretary of the Central Committee of the Communist Party of the Soviet Union, he was effectively the dictator of the state. Stalin was one of the seven members of the first Politburo, founded in 1917 in order to manage the Bolshevik Revolution, alongside Lenin, Zinoviev, Kamenev, Trotsky, Sokolnikov, and Bubnov. Among the Bolshevik revolutionaries who took part in the Russian Revolution of 1917 and he managed to consolidate power following the 1924 death of Vladimir Lenin by suppressing Lenins criticisms and expanding the functions of his role, all the while eliminating any opposition. He remained General Secretary until the post was abolished in 1952, the economic changes coincided with the imprisonment of millions of people in Gulag labour camps. The initial upheaval in agriculture disrupted food production and contributed to the catastrophic Soviet famine of 1932–33, major figures in the Communist Party and government, and many Red Army high commanders, were arrested and shot after being convicted of treason in show trials. Stalins invasion of Bukovina in 1940 violated the pact, as it went beyond the Soviet sphere of influence agreed with the Axis, Germany ended the pact when Hitler launched a massive invasion of the Soviet Union in June 1941. Despite heavy human and territorial losses, Soviet forces managed to halt the Nazi incursion after the decisive Battles of Moscow, after defeating the Axis powers on the Eastern Front, the Red Army captured Berlin in May 1945, effectively ending the war in Europe for the Allies. The Soviet Union subsequently emerged as one of two recognized world superpowers, the other being the United States, Communist governments loyal to the Soviet Union were established in most countries freed from German occupation by the Red Army, which later constituted the Eastern Bloc. Stalin also had relations with Mao Zedong in China and Kim Il-sung in North Korea. On February 9,1946, Stalin delivered a public speech in which he explained the fundamental incompatibility of communism and capitalism. He stressed that the system needed war for raw materials. The Second World War was but the latest in a chain of conflicts which could be broken only when the economy made the transformation into communism. Stalin led the Soviet Union through its post-war reconstruction phase, which saw a significant rise in tension with the Western world that would later be known as the Cold War, Stalin remains a controversial figure today, with many regarding him as a tyrant. However, popular opinion within the Russian Federation is mixed, the exact number of deaths caused by Stalins regime is still a subject of debate, but it is widely agreed to be in the order of millions. Joseph Stalin was born Ioseb Besarionis dze Jughashvili, the Russian-language version of his birth name is Iosif Vissarionovich Dzhugashvili. Ioseb was born on 18 December 1878 in the town of Gori, Georgia and his father was Besarion Jughashvili, a cobbler, while his mother was Ekaterine Keke Geladze, a housemaid. As a child, Ioseb was plagued with health issues

31.
United States Pacific Fleet
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The United States Pacific Fleet is a Pacific Ocean theater-level component command of the United States Navy that provides naval forces to the United States Pacific Command. Fleet headquarters is at Pearl Harbor Naval Station, Hawaii, with large facilities at North Island. A Pacific Fleet was created in 1907 when the Asiatic Squadron, in 1910, the ships of the First Squadron were organized back into a separate Asiatic Fleet. The General Order 94 of 6 December 1922 organized the United States Fleet, until May 1940, the Battle Fleet was stationed on the west coast of the United States. During the summer of year, as part of the U. S. response to Japanese expansionism, it was instructed to take an advanced position at Pearl Harbor. Long term basing at Pearl Harbor was so strongly opposed by the commander, Admiral James O. Richardson, political considerations were thought sufficiently important that he was relieved by Admiral Husband E. Kimmel, who was in command at the time of the attack on Pearl Harbor. The Pacific Fleet was formally recreated on 1 February 1941, on that day General Order 143 split the United States Fleet into separate Atlantic, Pacific, and Asiatic Fleets. On 7 December, the Fleet consisted of the Battle Force, Scouting Force, Base Force, Amphibious Force, Cruiser Force, Destroyer Force, also in Hawaii was the Fourteenth Naval District, commanded by Rear Admiral Claude C. At the time of the attack on Pearl Harbor, Pennsylvania was in dry dock and Colorado was being refitted at Bremerton Navy Yard, arizona was mated with Nevada and Oklahoma at that time. Other components of the Battle Force included Aircraft, Battle Force, with Carrier Division One and Carrier Division Two, plus Cruiser Divisions 4,5, the Scouting Force included Cruiser Division Three, Cruiser Division Nine and Submarines, Scouting Force. The Amphibious Force was formally known as Commander, Amphibious Forces, One of PhibPacs subordinate commands during World War II was Transports, Amphibious Force, Pacific Fleet, or TransPhibPac. The commander of TransPhibPac was known as ComTransPhibPac, in December 1941, the fleet consisted of nine battleships, three aircraft carriers,12 heavy cruisers, eight light cruisers,50 destroyers,33 submarines, and 100 patrol bombers. This was approximately the strength at the time of the Japanese attack on Pearl Harbor. That day, the Japanese Combined Fleet carried out the attack on Pearl Harbor, Navy to rely primarily on aircraft carriers and submarines for many months afterward. More minor battles included the Battle of Dutch Harbor, the West Loch disaster occurred at Pearl Harbor on 21 May 1944. The Pacific Fleet took part in Operation Magic Carpet, the return of U. S. servicemen, after the end of the Second World War. The organization of the Pacific Fleet in January 1947 is shown in Hal M. Friedmans Arguing over the American Lake, Bureaucracy and Rivalry in the U. S. Pacific, the RIMPAC exercise series began in 1971. On 7 March 1984, the Secretaries of Transportation and Navy signed a Memorandum of Agreement which created the Maritime Defense Zones, the Pacific MDZ is an echelon three Navy command under the Commander U. S

32.
Kwajalein Atoll
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Kwajalein Atoll is part of the Republic of the Marshall Islands. The southernmost and largest island in the atoll is named Kwajalein Island, the total land area of the atoll amounts to just over 6 square miles. The atoll lies in the Ralik Chain,2,100 nautical miles southwest of Honolulu, Hawaii, Kwajalein is one of the worlds largest coral atolls as measured by area of enclosed water. Comprising 97 islands and islets, it has an area of 16.4 km² and surrounds one of the largest lagoons in the world. The average height above sea level for all the islands is about 1.8 metres, Islands often have alternate names, the first is the Marshallese name, the second was assigned somewhat arbitrarily by the US Navy prior to their attack on the atoll during World War II. The original name was considered too difficult for English speakers to properly differentiate among the islands, the latter has often been retained by English speakers. The exception to this is Kwajalein itself, which is close to the native name, the atoll is 2,100 miles from Honolulu,2,000 miles from Australia, and 2,100 miles from Japan. Kwajalein Island is about 500 miles north of the equator, Kwajalein Island is the southernmost and largest of the islands in the atoll. The area is about 1.2 square miles and it is 2.5 miles long and averages about 800 yards wide. To enlarge the island, the Americans placed fill at both the part of the island above the pier, the northern part extending towards Ebeye. The northern extension was used for housing, the remainder for industrial purposes, some 13,500 Marshallese citizens live on the atoll, most of them on Ebeye Island. The water temperature averages 81 °F degrees, underwater visibility is typically 100 feet on the ocean side of the atoll. SAR Pass is closest to Kwajalein on the West reef and this pass is manmade and was created in the mid-1950s. It is very narrow and shallow compared to the passes in the lagoon and is only used by small boats. South Pass is on the West reef, north of SAR Pass, Gea Pass is a deep water pass between Gea and Ninni islands. Bigej Pass is the first pass on the East reef north of Kwajalein, other islands in the atoll, Directly north of the eastern end of Kwajalein is Ebeye. It is not part of the Reagan Test Site, it is a Marshallese island-city with shops, restaurants and it has the largest population in the atoll, with approximately 13,000 residents living on 80 acres of land. Inhabitants are mostly Marshall Islanders but include a population of migrants and volunteers from other island groups

33.
Enewetak Atoll
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Enewetak Atoll is a large coral atoll of 40 islands in the Pacific Ocean and with its 850 people forms a legislative district of the Ralik Chain of the Marshall Islands. With a land area less than 5.85 square kilometres, its not higher than 5 metres. It is the second-westernmost atoll of the Ralik Chain and is 305 kilometres west from Bikini Atoll. Nuclear testing by the US totaling more than 30 megatons of TNT took place during the war, in 1977–1980. The Runit Dome is deteriorating and could be breached by a typhoon, the U. S. government referred to the atoll as Eniwetok until 1974, when it changed its official spelling to Enewetak. Enewetak Atoll formed atop a seamount, the seamount was formed in the late Cretaceous. This seamount is now about 4,600 feet below sea level and it is made of basalt, and its depth is due to a general subsidence of the entire region and not because of erosion. Enewetak has an elevation above sea level of 10 feet. Humans have inhabited the atoll since about 1,000 B. C, the first European visitor to Enewetak, Spanish explorer Alvaro de Saavedra, arrived on 10 October 1529. He called the island Los Jardines, in 1794 sailors aboard the British merchant sloop Walpole called the islands Browns Range. It was visited by about a dozen ships before the establishment of the German colony of the Marshall Islands in 1885. With the rest of the Marshalls, Enewetak was captured by the Imperial Japanese Navy in 1914 during World War I, the Japanese administered the island under the South Pacific Mandate, but mostly left affairs in hands of traditional local leaders until the start of World War II. The 1st Amphibious arrived on January 4,1944, combat also occurred on the main islet of Enewetak itself and on Parry Island, site of a Japanese seaplane base. Following its capture, the anchorage at Enewetak became a forward base for the U. S. Navy. The daily average of ships present during the first half of July 1944 was 488, woods, who executed the Nazi war criminals convicted at the Nuremberg Trials, was accidentally electrocuted here. Following the end of World War II, Enewetak came under the control of the United States as part of the Trust Territory of the Pacific Islands until the independence of the Marshall Islands in 1986. During its tenure, the United States evacuated the local residents many times, the atoll was used for nuclear testing as part of the Pacific Proving Grounds. Before testing commenced, the U. S. exhumed the bodies of United States servicemen killed in the Battle of Enewetak, forty-three nuclear tests were fired at Enewetak from 1948 to 1958

34.
Allies of World War II
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The Allies of World War II, called the United Nations from the 1 January 1942 declaration, were the countries that together opposed the Axis powers during the Second World War. The Allies promoted the alliance as seeking to stop German, Japanese, at the start of the war on 1 September 1939, the Allies consisted of France, Poland and the United Kingdom, and dependent states, such as the British India. Within days they were joined by the independent Dominions of the British Commonwealth, Australia, Canada, New Zealand, Poland was a minor factor after its defeat in 1939, France was a minor factor after its defeat in 1940. China had already been into a war with Japan since the Marco Polo Bridge Incident of 1937. The alliance was formalised by the Declaration by United Nations, from 1 January 1942, however, the name United Nations was rarely used to describe the Allies during the war. The leaders of the Big Three – the UK, the Soviet Union, in 1945, the Allied nations became the basis of the United Nations. The origins of the Allied powers stem from the Allies of World War I, Germany resented signing Treaty of Versailles. The new Weimar republics legitimacy became shaken, by the early 1930s, the Nazi Party led by Adolf Hitler became the dominant revanchist movement in Germany and Hitler and the Nazis gained power in 1933. The Nazi regime demanded the cancellation of the Treaty of Versailles and made claims to German-populated Austria. The likelihood of war was high, and the question was whether it could be avoided through strategies such as appeasement, in Asia, when Japan seized Manchuria in 1931, the League of Nations condemned it for aggression against China. Japan responded by leaving the League of Nations in March 1933, after four quiet years, the Sino-Japanese War erupted in 1937 with Japanese forces invading China. The League of Nations condemned Japans actions and initiated sanctions on Japan, the United States, in particular, was angered at Japan and sought to support China. In March 1939, Germany took over Czechoslovakia, violating the Munich Agreement signed six months before, Britain and France decided that Hitler had no intention to uphold diplomatic agreements and responded by preparing for war. On 31 March 1939, Britain formed the Anglo-Polish military alliance in an effort to avert a German attack on the country, also, the French had a long-standing alliance with Poland since 1921. The Soviet Union sought an alliance with the powers. The agreement secretly divided the independent nations of eastern Europe between the two powers and assured adequate oil supplies for the German war machine, on 1 September 1939, Germany invaded Poland, two days later Britain and France declared war on Germany. Then, on 17 September 1939, the Soviet Union invaded Poland from the east, a Polish government-in-exile was set up and it continued to be one of the Allies, a model followed by other occupied countries. After a quiet winter, Germany in April 1940 invaded and quickly defeated Denmark, Norway, Belgium, Britain and its Empire stood alone against Hitler and Mussolini

35.
Aircraft carrier
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An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the ship of a fleet, as it allows a naval force to project air power worldwide without depending on local bases for staging aircraft operations. Aircraft carriers are expensive to build and are critical assets, there is no single definition of an aircraft carrier, and modern navies use several variants of the type. These variants are sometimes categorized as sub-types of aircraft carriers, Aircraft carriers may be classified according to the type of aircraft they carry and their operational assignments. Admiral Sir Mark Stanhope, former head of the Royal Navy, has said, To put it simply, as of April 2017, there are 37 active aircraft carriers in the world within twelve navies. The United States Navy has 10 large nuclear-powered fleet carriers, the largest carriers in the world, the Royal Navy of Great Britain is building two 280-m / 920-ft carriers, the Queen Elizabeth, and the Prince of Wales scheduled to go into service in 2020-2023. These are the largest carriers capable of fast speeds, by comparison, escort carriers were developed to provide defense for convoys of ships. They were smaller and slower with lower numbers of aircraft carried, most were built from mercantile hulls or, in the case of merchant aircraft carriers, were bulk cargo ships with a flight deck added on top. Light aircraft carriers were fast enough to operate with the main fleet, three nations currently operate carriers of this type, ten by the United States, and one each by France and Brazil for a total of twelve in service. Short take-off but arrested-recovery, these carriers are generally limited to carrying lighter fixed-wing aircraft with more limited payloads, currently, Russia, China, and India possess commissioned carriers of this type. Short take-off vertical-landing, limited to carrying STOVL aircraft and this type of aircraft carrier is currently in service with Italy. Some also count the nine US amphibious assault ships in their secondary light carrier role boosting the total to thirteen. Helicopter carrier, Helicopter carriers have an appearance to other aircraft carriers. Some are designed for addition of, or may include, a ski jump ramp allowing for STOVL operations or may have a ski jump installed before retirement of STOVL aircraft. In the past, some conventional carriers were converted and called commando carriers by the Royal Navy, some helicopter carriers with a resistant flight surface can operate STOVL jets. Currently the majority of carriers, but not all, are classified as amphibious assault ships. The US has nine of this type, France and Japan three, Australia two, the UK one, the Republic of Korea one and Spain one, the US and Spains amphibious assault ships operate STOVL jets in normal deployment. Supercarrier Fleet carrier Light aircraft carrier Escort carrier Several systems of identification symbol for aircraft carriers, two months later, on 18 January 1911, Ely landed his Curtiss pusher airplane on a platform on the armored cruiser USS Pennsylvania anchored in San Francisco Bay

36.
Marshall Islands
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The Marshall Islands, officially the Republic of the Marshall Islands, is an island country located near the equator in the Pacific Ocean, slightly west of the International Date Line. Geographically, the country is part of the island group of Micronesia. The countrys population of 53,158 people is spread out over 29 coral atolls, comprising 1,156 individual islands and islets. The islands share maritime boundaries with the Federated States of Micronesia to the west, Wake Island to the north, Kiribati to the south-east, about 27,797 of the islanders live on Majuro, which contains the capital. Micronesian colonists gradually settled the Marshall Islands during the 2nd millennium BC, Islands in the archipelago were first explored by Europeans in the 1520s, with Spanish explorer Alonso de Salazar sighting an atoll in August 1526. Other expeditions by Spanish and English ships followed, the islands derive their name from British explorer John Marshall, who visited in 1788. The islands were known by the inhabitants as jolet jen Anij. The European powers recognized Spanish sovereignty over the islands in 1874 and they had been part of the Spanish East Indies formally since 1528. Later, Spain sold the islands to the German Empire in 1884, in World War I the Empire of Japan occupied the Marshall Islands, which in 1919 the League of Nations combined with other former German territories to form the South Pacific Mandate. In World War II, the United States conquered the islands in the Gilbert, along with other Pacific Islands, the Marshall Islands were then consolidated into the Trust Territory of the Pacific Islands governed by the US. Self-government was achieved in 1979, and full sovereignty in 1986, Marshall Islands has been a United Nations member state since 1991. The country uses the United States dollar as its currency, the majority of the citizens of the Marshall Islands are of Marshallese descent, though there are small numbers of immigrants from the United States, China, Philippines, and other Pacific islands. The two official languages are Marshallese, which is a member of the Malayo-Polynesian languages, and English, micronesians settled the Marshall Islands in the 2nd millennium BC, but there are no historical or oral records of that period. Over time, the Marshall Island people learned to navigate over long distances by canoe using traditional stick charts. Spanish explorer Alonso de Salazar was the first European to see the islands in 1526, commanding the ship Santa Maria de la Victoria, on August 21, he sighted an island at 14°N that he named San Bartolome. On September 21,1529, Álvaro de Saavedra Cerón commanded the Spanish ship Florida and he stood off a group of islands from which local inhabitants hurled stones at his ship. These islands, which he named Los Pintados, may have been Ujelang, on October 1, he found another group of islands where he went ashore for eight days, exchanged gifts with the local inhabitants and took on water. These islands, which he named Los Jardines, may have been Enewetak or Bikini Atoll

37.
United States Third Fleet
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The Third Fleet is one of the numbered fleets in the United States Navy. Major oil and trade sea lines of communication within this area are important to the economic health of the United States. The Third Fleet plans and executes operations in the Pacific Ocean. The fleet provides maritime homeland defense, regional security, and humanitarian support through integrated naval. The Third Fleet ensures realistic, relevant training to our people so they have the skills to promote peace. The Third Fleet is a power in control of ships, submarines, and aircraft stationed in California, Washington. The Third Fleets sea-going force includes five aircraft carrier groups, each consisting of a combination of cruisers, destroyers. They also have more than 30 submarines and a dozen ships to support the strike groups. Third Fleets air forces comprises more than 400 Navy aircraft, including F/A-18 Super Hornets, E-2C Hawkeyes, AV-8B Harriers, AH-1Z SuperCobras, first established in 1943, the Third Fleet conducted extensive operations against Japanese forces in the Central Pacific during World War II. Deactivated in 1945, the fleet remained inactive until 1973, when it was reactivated and assumed its current responsibilities, the Third Fleet was originally formed during World War II on 15 March 1943 under the command of Admiral William F. Halsey. Its on-shore headquarters in Pearl Harbor, Hawaii was established on 15 June 1944. The ships of the Third Fleet also formed the basis of the Fifth Fleet, formed on 26 April 1944, Spruance and Halsey alternated command of the fleet for major operations, allowing the other admiral and his staff time to plan for subsequent operations. A secondary benefit was confusing the Japanese into thinking there were actually two separate fleets as the fleet designation flipped back and forth. The British Pacific Fleet was operating as Task Force 57 of the Fifth Fleet when Halsey relieved Spruance of command in May 1945, like the rest of the Fifth Fleets ships, the British ships were resubordinated from Spruances Fifth Fleet to Halseys Third Fleet. The British Pacific Fleet then constituted Task Force 37 under the Third Fleets operational command through the end of World War II on 15 August 1945, the end of the war made this operation unnecessary. Embarked aboard Missouri, Admiral Halsey led the Third Fleet into Tokyo Bay on 29 August 1945, on 2 September 1945, the documents of surrender of the Japanese Empire ending the war were signed on Missouris deck. The Third Fleet remained in Japanese waters until late September 1945, on 7 October 1945, the Third Fleet was designated a reserve fleet and decommissioned from active status. Third Fleets new duties were to train naval forces for overseas deployment, additionally, Third Fleet could deploy in the event of a major conflict

38.
Flagship
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A flagship is a vessel used by the commanding officer of a group of naval ships, characteristically a flag officer entitled by custom to fly a distinguishing flag. Used more loosely, it is the ship in a fleet of vessels, typically the first, largest, fastest, most heavily armed. In common naval use, the flagship is fundamentally a temporary designation. Historically, only larger ships could accommodate such requirements, the term was also used by commercial fleets, when the distinction between a nations navy and merchant fleet was not clear. In the age of sailing ships, the flagship was typically a first-rate, non-first rates could serve as flagships, however, the USS Constitution, a frigate, served as flagship for parts of the United States Navy during the early 19th century. In the 20th century, ships became large enough that the types, cruisers and up, could accommodate a commander. Some larger ships may have a flag bridge for use by the admiral. Because its primary function is to coordinate a fleet, a flagship is not necessarily more heavily armed or armored than other ships, during World War II admirals often preferred a faster ship over the largest one. Modern flagships are designed primarily for command and control rather than for fighting, as with many other naval terms, flagship has crossed over into general usage, where it means the most important or leading member of a group, as in the flagship station of a broadcast network. Is used as both a noun and adjective describing the most prominent or highly touted product, brand, location, derivations include the flagship brand or flagship product of a manufacturing company, flagship store of a retail chain, or flagship service of a hospitality or transportation concern. The term flagship may have applications, Auto companies may have a flagship in the form of their leading or highest-priced car. Electronics companies may have a series of products considered to be their flagship, for example, the Samsung Galaxy S series consists of several flagship smartphones that are released on a yearly basis. In rail transport, a service is either the fastest or most luxurious. Often it is also a train or service. In some cases, special service or a class above first class may be available in the service while it is not offered in normal services. Flagship services are used to present the company in advertising or abroad. Most states in the United States provide public university education through one or more university systems, the phrase flagship institution or flagship university may be applied to an individual school or campus within each state system. These schools are often land-grant, sea-grant, or space-grant research universities, the use of the term is seen by some as elitist and boastful

39.
William Halsey Jr.
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William Frederick Halsey Jr. GBE, known as Bill Halsey or Bull Halsey, was an American fleet admiral in the United States Navy. At the start of the War in the Pacific Halsey commanded the task force centered on the carrier Enterprise in a series of raids against Japanese-held targets. He was made commander, South Pacific Area and led the Allied forces over the course of the Battle for Guadalcanal, in 1943 he was made commander of the Third Fleet, the post he held through the rest of the war. Halsey was born in Elizabeth, New Jersey, on October 30,1882 and his father was a descendant of Senator Rufus King, who was an American lawyer, politician, diplomat, and Federalist. After waiting two years to receive an appointment to the United States Naval Academy, Halsey decided to study medicine at the University of Virginia and he chose Virginia because his best friend, Karl Osterhause, was there. While there, Halsey joined the Delta Psi fraternity and was also a member of the secretive Seven Society, after his first year, Halsey received his appointment to the United States Naval Academy at Annapolis, and entered the Academy in the fall of 1900. Halsey graduated from the Naval Academy on February 2,1904, after lettering in football as a fullback and earning several athletic honors. He spent his service years in battleships and sailed with the main battle fleet aboard the battleship USS Kansas as Roosevelts Great White Fleet circumnavigated the globe from 1907 to 1909. Halsey was on the bridge of the battleship USS Missouri on Wednesday, April 13,1904, No explosion occurred, but the rapid burning of the powder burnt and suffocated to death 31 officers and men. This resulted in Halsey dreading the 13th of every month, especially when it fell on a Friday, after his service on the Missouri, Halsey served aboard torpedo boats, beginning with USS Du Pont in 1909. Halsey was one of the few officers who was promoted directly from Ensign to full lieutenant, at that time, the destroyer and the torpedo boat, though extremely hazardous, were the most effective way to bring the torpedo into combat against capital ships. Lieutenant Commander Halseys World War I service, including command of USS Shaw in 1918, in October 1922, he was the naval attaché at the American Embassy in Berlin, Germany. One year later, he was given additional duty as naval attaché at the American Embassies in Christiana, Norway, Copenhagen, Denmark and he then returned to sea duty, again in destroyers in European waters, in command of USS Dale and USS Osborne. In 1934 the chief of the Bureau of Aeronautics, Navy Admiral Ernest King, offered Halsey command of the aircraft carrier USS Saratoga, Captain Halsey elected to enroll as a cadet for the full 12-week Naval Aviator course rather than the simpler Naval Aviation Observer program. I thought it better to be able to fly the aircraft itself than to just sit back and be at the mercy of the pilot. Halsey earned his Naval Aviators Wings on May 15,1935, at the age of 52 and he went on to command the Saratoga, and later the Naval Air Station Pensacola at Pensacola, Florida. Halsey considered airpower an important part of the navy, commenting, The naval officer in the next war had better know his aviation. Captain Halsey was promoted to admiral in 1938

40.
Surrender of Japan
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The surrender of Imperial Japan was announced on August 15 and formally signed on September 2,1945, bringing the hostilities of World War II to a close. By the end of July 1945, the Imperial Japanese Navy was incapable of conducting major operations, on August 6,1945, at 8,15 AM local time, the United States detonated an atomic bomb over the Japanese city of Hiroshima. Sixteen hours later, American President Harry S. Truman called again for Japans surrender, warning them to expect a rain of ruin from the air, later in the day, the United States dropped a second atomic bomb, this time on the Japanese city of Nagasaki. After several more days of negotiations and a failed coup détat. In the radio address, called the Jewel Voice Broadcast, he announced the surrender of Japan to the Allies, on August 28, the occupation of Japan by the Supreme Commander for the Allied Powers began. The role of the bombings in Japans unconditional surrender. The state of war ended when the Treaty of San Francisco came into force on April 28,1952. Four more years passed before Japan and the Soviet Union signed the Soviet–Japanese Joint Declaration of 1956, by 1945, the Japanese had suffered an unbroken string of defeats for nearly two years in the South West Pacific, the Marianas campaign, and the Philippines campaign. In July 1944, following the loss of Saipan, General Hideki Tōjō was replaced as minister by General Kuniaki Koiso. After the Japanese loss of the Philippines, Koiso in turn was replaced by Admiral Kantarō Suzuki, the Allies captured the nearby islands of Iwo Jima and Okinawa in the first half of 1945. Okinawa was to be an area for Operation Downfall, the American invasion of the Japanese Home Islands. The Allied submarine campaign and the mining of Japanese coastal waters had largely destroyed the Japanese merchant fleet, the destruction of the Japanese merchant fleet, combined with the strategic bombing of Japanese industry, had wrecked Japans war economy. Production of coal, iron, steel, rubber, and other vital supplies was only a fraction of that before the war, as a result of the losses it had suffered, the Imperial Japanese Navy had ceased to be an effective fighting force. Although 19 destroyers and 38 submarines were still operational, their use was limited by the lack of fuel, the only course left is for Japans one hundred million people to sacrifice their lives by charging the enemy to make them lose the will to fight. As a final attempt to stop the Allied advances, the Japanese Imperial High Command planned an all-out defense of Kyūshū codenamed Operation Ketsugō and this was to be a radical departure from the defense in depth plans used in the invasions of Peleliu, Iwo Jima, and Okinawa. Instead, everything was staked on the beachhead, more than 3,000 kamikazes would be sent to attack the transports before troops. The strategy of making a last stand at Kyūshū was based on the assumption of continued Soviet neutrality, a set of caves were excavated near Nagano on Honshu, the largest of the Japanese islands. In the event of invasion, these caves, the Matsushiro Underground Imperial Headquarters, were to be used by the army to direct the war and to house the Emperor and his family

41.
Tokyo Bay
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Tokyo Bay is a bay located in the southern Kantō region of Japan, and spans the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel and its old name was Edo Bay. The Tokyo Bay region is both the most populous and largest industrialized area in Japan, in ancient times, Japanese knew Tokyo Bay as the uchi-umi or inner sea. By the Azuchi-Momoyama period the area had become known as Edo Bay, the bay took its present name of Tokyo Bay in modern times, after the Imperial court moved to Edo and renamed that city as Tokyo in 1868. Tokyo Bay juts prominently into the Kantō Plain and it is surrounded by the Bōsō Peninsula in Chiba Prefecture to the east and the Miura Peninsula in Kanagawa Prefecture to the west. The shore of Tokyo Bay consists of a plateau and is subject to rapid marine erosion. Sediments on the shore of the bay make for a smooth, in a narrow sense, Tokyo Bay is the area north of the straight line from Cape Kannon on the west of Miura Peninsula to Cape Futtsu on the east Bōsō Peninsula. This area covers about 922 square kilometres, in a broader sense, Tokyo Bay includes the Uraga Channel. By this definition the bay opens from a north of the straight line from Cape Tsurugisaki on the east of Miura Peninsula to Cape Sunosaki on the west of the Boso Peninsula. This area covers about 1,100 square kilometres, the area of Tokyo Bay combined with the Uraga Channel covers 1,500 square kilometres. The shoal between Cape Futtsu in Chiba Prefecture and Cape Honmaku in Yokohama is known as Nakanose, and has a depth of 20 metres, north of this area the bay has a depth of 40 metres and an uncomplicated submarine topography. Areas south of Nakanose are significantly deeper moving towards the Pacific Ocean, the only natural island in Tokyo Bay is Sarushima at Yokosuka, Kanagawa Prefecture. Sarushima was one of the locations fortified with coastal artillery during the Bakumatsu period and was incorporated into the Tokyo Bay Fortress during the Meiji period. The Imperial Japanese Navy maintained a station on the island until the end of World War II. The island is now uninhabited and is a marine park, many artificial islands were built as naval fortifications in the Meiji and Taishō period. After World War II these islands were converted to residential or recreational use, Odaiba, also known as Daiba, was one of six artificial islands constructed in 1853 as a fortification to protect the Tokugawa shogunate at Edo, and was known as the Shinagawa Daiba. After World War II Odaiba was incorporated into Tokyo and redeveloped for commercial and recreational use, after World War II Yumenoshima was planned as a solution to dispose of the large quantities of garbage from the Tokyo Metropolitan Area. The island was constructed between 1957 and 1967 and hosts numerous recreational facilities, hakkei Island, formerly Landfill Number 14, was constructed in 1985 and is home to Yokohama Hakkeijima Sea Paradise

42.
Korean War
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The Korean War began when North Korea invaded South Korea. The United Nations, with the United States as the principal force, China came to the aid of North Korea, and the Soviet Union gave some assistance. Korea was ruled by Japan from 1910 until the days of World War II. In August 1945, the Soviet Union declared war on Japan, as a result of an agreement with the United States, U. S. forces subsequently moved into the south. By 1948, as a product of the Cold War between the Soviet Union and the United States, Korea was split into two regions, with separate governments, both governments claimed to be the legitimate government of all of Korea, and neither side accepted the border as permanent. The conflict escalated into open warfare when North Korean forces—supported by the Soviet Union, on that day, the United Nations Security Council recognized this North Korean act as invasion and called for an immediate ceasefire. On 27 June, the Security Council adopted S/RES/83, Complaint of aggression upon the Republic of Korea and decided the formation, twenty-one countries of the United Nations eventually contributed to the UN force, with the United States providing 88% of the UNs military personnel. After the first two months of war, South Korean forces were on the point of defeat, forced back to the Pusan Perimeter, in September 1950, an amphibious UN counter-offensive was launched at Inchon, and cut off many North Korean troops. Those who escaped envelopment and capture were rapidly forced back north all the way to the border with China at the Yalu River, at this point, in October 1950, Chinese forces crossed the Yalu and entered the war. Chinese intervention triggered a retreat of UN forces which continued until mid-1951, after these reversals of fortune, which saw Seoul change hands four times, the last two years of fighting became a war of attrition, with the front line close to the 38th parallel. The war in the air, however, was never a stalemate, North Korea was subject to a massive bombing campaign. Jet fighters confronted each other in combat for the first time in history. The fighting ended on 27 July 1953, when an armistice was signed, the agreement created the Korean Demilitarized Zone to separate North and South Korea, and allowed the return of prisoners. However, no treaty has been signed, and the two Koreas are technically still at war. Periodic clashes, many of which are deadly, continue to the present, in the U. S. the war was initially described by President Harry S. Truman as a police action as it was an undeclared military action, conducted under the auspices of the United Nations. In South Korea, the war is referred to as 625 or the 6–2–5 Upheaval. In North Korea, the war is referred to as the Fatherland Liberation War or alternatively the Chosǒn War. In China, the war is called the War to Resist U. S

43.
Ship commissioning
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Ship commissioning is the act or ceremony of placing a ship in active service, and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to the placing of a warship in active duty with its countrys military forces, the ceremonies involved are often rooted in centuries old naval tradition. Ship naming and launching endow a ship hull with her identity, the engineering plant, weapon and electronic systems, galley, and multitudinous other equipment required to transform the new hull into an operating and habitable warship are installed and tested. The prospective commanding officer, ships officers, the petty officers, prior to commissioning, the new ship undergoes sea trials to identify any deficiencies needing correction. USS Monitor, of American Civil War fame, was commissioned less than three weeks after launch, regardless of the type of ship in question, a vessels journey towards commissioning in its nations navy begins with process known as sea trials. Sea trials begin when the ship in question is floated out of its dry dock, after a ship has successfully cleared its sea trial period, it will officially be accepted into service with its nations navy. At this point, the ship in question will undergo a process of degaussing and/or deperming, once a ships sea trials are successfully completed plans for the actual commissioning ceremony will take shape. If the ships ceremony is an affair the Captain may make a speech to the audience. Religious ceremonies, such as blessing the ship or the singing of hymns or songs. Once a ship has been commissioned its final step toward becoming a unit of the navy it now serves is to report to its home port. To decommission a ship is to terminate its career in service in the forces of a nation. Decommissioning of the vessel may also occur due to treaty agreements or for safety reasons, vessels preserved in this manner typically do not relinquish their names to other, more modern ships that may be in the design, planning, or construction phase of the parent nations navy. Prior to its decommissioning, the ship in question will begin the process of decommissioning by going through a preliminary step called inactivation or deactivation. The removed material from a ship usually ends up either rotating to another ship in the class with similar weapons and/or capabilities, or in storage pending a decision on equipments fate. During this time a crew may be thinned out via transfers. When a ship finishes its inactivation, it is then formally decommissioned, often, but not always, ships that are decommissioned end up spending the next few years in a reserve fleet before their ultimate fate is decided. Commissioning in the early United States Navy under sail was attended by no ceremony, thus, the ship was placed in commission. Commissionings were not public affairs, and unlike christening-and-launching ceremonies, were not recorded by newspapers, the first specific reference to commissioning located in naval records is a letter of November 6,1863, from Secretary of the Navy Gideon Welles to all navy yards and stations

44.
United States Navy reserve fleets
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The United States Navy maintains a number of its ships as part of a reserve fleet, often called the Mothball Fleet. While the details of the maintenance activity have changed several times, in some cases, many ships were successfully reactivated at a considerable savings in time and money. The usual fate of ships in the fleet, though, is to become too old and obsolete to be of any use. In November 1976, the organization was the Inactive Ship Division of the Naval Ship Systems Command. Since 2004, the organization is called the Navy Inactive Fleet. As of 2011, the organization actually appears to be the Inactive Ships Management Office of the Program Executive Officer - Ships, Naval Sea Systems Command, Portsmouth. Merchant ships held in reserve are managed as part of the separate National Defense Reserve Fleet within MARAD, several of its sites, such as at Suisun Bay in California, are also used to store regular Navy ships. Ships placed in the fleets are categorized depending on priority, funding. Category B Ships in this category are prioritized over the other categories when it comes to maintenance and they are retained for possible future mobilization and will receive updates and upgrades as funding permits. Category C These are ships that will be maintained as-is, meaning no updates or improvements unless funding becomes available after that assigned for category B ships has been exhausted, category D Temporary state pending planned usage by the Navy, will be maintained as-is. Category X Ships stricken from the Naval Vessel Register awaiting disposal, receives no maintenance except ships on donation hold which undergoes dehumidification and cathodic protection. Category Z This category is for nuclear-powered ships and related support ships pending disposal, around 1912, the Atlantic Reserve Fleet and the Pacific Reserve Fleet were established as reserve units, still operating ships, but on a greatly reduced schedule. For example, USS Brock was underway for Green Cove Springs, Florida, Brock arrived there on 13 April 1945, and joined the Florida Group, 16th Fleet, which later became the Florida Group, Atlantic Reserve Fleet. S. These Liberty Ships were also used as the support vessel for its fleet of warships. It was a race between how fast the U. S. could build ships and how fast the German U-Boats could sink them. Most of these Liberty Ships when deactivated were put into mothball fleets strategically located around the coasts of the U. S and they began to be deactivated and scrapped in the early 1970s. The groups of the Atlantic Reserve Fleet were at Boston, Charleston, Green Cove Springs, Florida, New London, MOTBY/New York Harbor, Norfolk, Philadelphia, and Texas. The groups of the Pacific Reserve Fleet were at Alameda, Bremerton, Columbia River, Long Beach, Mare Island, San Diego, San Francisco, Stockton, Tacoma and Olympia, Washington

45.
600-ship Navy
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The 600-Ship Navy was a strategic plan of the United States Navy during the 1980s to rebuild its fleet after cutbacks that followed the end of the Vietnam War. The actual number of ships peaked at 594 in 1987, before declining sharply after the end of the Cold War in 1989-1991, lehman, who became Reagans Secretary of the Navy, and Caspar Weinberger, Reagans Secretary of Defense. The idea behind the 600-ship Navy can be traced back to the Vietnam War, during the war, the armed services rapidly expanded to meet the demands placed on them. The Soviet Union, which had been supporting North Vietnam, began staging their naval vessels from former US ports in South Vietnam, building on this gain, Soviet vessels began to sail in all seven seas with increased vigor and even ventured into the Gulf of Mexico. Soviet forces also stepped up infantry, armor and air force deployments in Eastern Europe and it was against this backdrop in 1980 that the United States began an election year. Ronald Reagan continued this in 1984, releasing a commercial, A bear in the woods. Lehman attempted to front-load the program, by committing the Navy to the building program, the Navy saw the largest benefit of the rebuilding. Under the Reagan Administration, the first of the Ohio-class ballistic missile submarines was completed and this class was the largest submarine ever built in the US. The ship carried 24 Trident I nuclear-capable missiles, each one with a 4, construction of the Nimitz class of supercarriers and Los Angeles-class attack submarines was dramatically stepped up. The revolutionary new Aegis combat system was installed on the up-and-coming Ticonderoga-class ships, several aircraft carriers were put through Service Life Extension Programs aimed at keeping them in service longer. The first Harpoons, Tomahawks, and AGM-88 HARM missiles all debuted on the navys ships, Naval aviation was stepped up with the introduction of the F/A-18 Hornet, along with improved versions of the EA-6 Prowler electronic countermeasure aircraft, the A-6 Intruder, and the F-14 Tomcat. In addition, the nations strategic retaliatory arm was strengthened with advanced B-1B bombers, the initiative also included deployment of sophisticated Abrams main battle tanks and Bradley armored fighting vehicles. Weinberger clashed with Congress over the cuts, resigning in late 1987, lehmans successor as Navy Secretary, Jim Webb, remained a fierce proponent of the expanded fleet, and disagreed with Carlucci over how to cut the Navy budget in line with other services. Webb resigned rather than endorse Carluccis cut of 16 frigates, as revealed in The Reagan Diaries, Reagan reflected about Webbs resignation on 22 February 1988, Present Sec. Webb resigned over budget cuts. I dont think Navy was sorry to see him go, US bases across Europe and North America were slowly decommissioned and closed, others were mothballed through the Base Realignment and Closure process. In the Navy, this resulted in the retirement of older carriers, the decommissioning of all four of the Iowa-class battleships. Cold War Cold War Holland, W. J, United States Naval Institute Proceedings Vol.134, No.2 p.40 -42 Norman Friedman

46.
Soviet Navy
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The Soviet Navy was the naval arm of the Soviet Armed Forces. The influence of the Soviet Navy played a role in the Cold War. The Soviet Navy was divided into four major fleets, the Northern, Pacific, Black Sea, the Caspian Flotilla was a smaller force operating in the land-locked Caspian Sea. Main components of the Soviet Navy included Soviet Naval Aviation, Naval Infantry, most of the Soviet Navy was reformed into the Russian Navy after the dissolution of the Soviet Union in 1991, while some elements became the basis of the Ukrainian, Azerbaijani and Georgian navies. During the revolution, sailors deserted their ships at will and generally neglected their duties, the officers were dispersed and most of the sailors left their ships. Work stopped in the shipyards, where uncompleted ships deteriorated rapidly, the Black Sea Fleet fared no better than the Baltic. The Bolshevik revolution entirely disrupted its personnel, with murders of officers. At the end of April 1918, German troops entered Crimea, the more effective ships were moved from Sevastopol to Novorossiysk where, after an ultimatum from Germany, they were scuttled by Vladimir Lenins order. The ships remaining in Sevastopol were captured by the Germans and then, after November 1918, on 1 April 1919, when Red Army forces captured Crimea, the British squadron had to withdraw, but before leaving they damaged all the remaining battleships and sank thirteen new submarines. When the White Army captured Crimea in 1919, it rescued and reconditioned a few units, at the end of the civil war, Wrangels fleet, a White fleet, moved to Bizerta in French Tunisia, where it was interned. The first ship of the navy could be considered the rebellious Imperial Russian cruiser Aurora. Sailors of the Baltic fleet supplied the fighting force of the Bolsheviks during the October Revolution, some imperial vessels continued to serve after the revolution, albeit with different names. The Soviet Navy, established as the Workers and Peasants Red Fleet by a 1918 decree of the Soviet government, was less than service-ready during the interwar years, as the countrys attentions were largely directed internally, the Navy did not have much funding or training. The greater part of the old fleet was sold by the Soviet government to Germany for scrap, in the Baltic Sea there remained only three much-neglected battleships, two cruisers, some ten destroyers, and a few submarines. Despite this state of affairs, the Baltic Fleet remained a significant naval formation, there also existed some thirty minor-waterways combat flotillas. During the 1930s, as the industrialization of the Soviet Union proceeded, approved by the Labour and Defence Council in 1926, the Naval Shipbuilding Program included plans to construct twelve submarines, the first six were to become known as the Dekabrist class. Beginning 4 November 1926, Technical Bureau Nº4, under the leadership of B. M, malinin, managed the submarine construction works at the Baltic Shipyard. In subsequent years,133 submarines were built to designs developed during Malinins management, additional developments included the formation of the Pacific Fleet in 1932 and the Northern Fleet in 1933

47.
USS Iowa turret explosion
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The USS Iowa turret explosion occurred in the Number Two 16-inch gun turret of the United States Navy battleship USS Iowa on 19 April 1989. The explosion in the gun room killed 47 of the turrets crewmen. Two major investigations were undertaken into the cause of the explosion, one by the U. S. Navy and then one by the General Accounting Office and Sandia National Laboratories. The first investigation into the explosion, conducted by the U. S. Navy, concluded that one of the gun turret crew members, Clayton Hartwig, during the investigation, numerous leaks to the media, later attributed to U. S. The victims families, the media, and members of the U. S. Congress were sharply critical of the U. S. Navys findings. The U. S. Senate and U. S. House Armed Services Committees both held hearings to inquire into the Navys investigation and later released reports disputing the U. S. Navys conclusions. The Senate committee asked the GAO to review the U. S. Navys investigation, to assist the GAO, Sandia National Laboratories provided a team of scientists to review the Navys technical investigation. During its review, Sandia determined that a significant overram of the bags into the gun had occurred as it was being loaded. A subsequent test by the Navy of the overram scenario confirmed that an overram could have caused an explosion in the gun breech. Sandias technicians also found that the evidence did not support the U. S. Navys theory that an electronic or chemical detonator had been used to initiate the explosion. In response to the new findings, the U. S. Navy, with Sandias assistance, in August 1991, Sandia and the GAO completed their reports, concluding that the explosion was likely caused by an accidental overram of powder bags into the breech of the 16-inch gun. The U. S. Navy, however, disagreed with Sandias opinion, the U. S. Navy expressed regret to Hartwigs family and closed its investigation. Ordered in 1938 under the Second Vinson Act, Iowa was the ship of her class of battleship. She was launched on 27 August 1942 and commissioned on 22 February 1943, iowa’s main battery consisted of nine 16 inch /50 caliber guns. After serving in both World War II and the Korean War, Iowa was decommissioned on 24 February 1958 and she remained in the Reserve Fleet until 1983. At this time, Iowa was moved to Avondale Shipyards near New Orleans, Louisiana, under the command of Captain Gerald E. Gneckow, she was recommissioned on 28 April 1984, one year ahead of schedule. Almost two years later, beginning on 17 March 1986, Iowa underwent her overdue InSurv inspection under the supervision of Rear Admiral John D. Bulkeley, among many other deficiencies, the ship was unable to achieve her top speed of 33 knots during a full-power engine run. Bulkeley personally recommended to the Chief of Naval Operations, Admiral James Watkins, and the Secretary of the Navy, John Lehman, a month after the InSurv, Iowa failed an Operation Propulsion Program Evaluation

The Bofors 40 mm gun, often referred to simply as the Bofors gun, is an anti-aircraft/multi-purpose autocannon designed …

British Bofors 40 mm L/60 on a 360 degree turret mount, England.

Finnish Bofors 40 mm. This gun mounts the original reflector sights, and lacks the armor found on British examples.

British 40mm L/60 includes the British-designed Stiffkey Sight, being operated by the gun layer standing on the right. The layer operates the trapeze seen above the sights, moving them to adjust for lead. The loader stands to the layer's left, and the two trainer/aimers are sitting on either side of the gun.

An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and …

Image: Fleet 5 nations

The Royal Navy's HMS ''Ark Royal'' in 1939, with Swordfish biplane fighters passing overhead. The British aircraft carrier was involved in the crippling of the German battleship the ''Bismarck'' in May 1941

Ship commissioning is the act or ceremony of placing a ship in active service, and may be regarded as a particular …

In 1999 the French carrier Charles De Gaulle began her sea trial phase, which identified the need for the flight deck to be extended for the safe operation of the E2C Hawkeye.

Hundreds attend the commissioning ceremony for the nuclear-powered aircraft carrierUSS ''Ronald Reagan''. Nancy Reagan, wife of the ship's namesake, gave the ship's crew its traditional first order as an active unit of the Navy: "Man the ship and bring her to life."